懶人翹筆記

＜VB＞檢視網頁原始碼

2012-05-20T22:07:00.000+08:00

目前這個程式無法顯示中文字部分

Imports System.Net
Imports System.IO

Public Class Form1

Private Sub btnView_Click(sender As System.Object, e As System.EventArgs) Handles btnView.Click
Dim request As Net.WebRequest
Dim response As Net.WebResponse
request = WebRequest.Create(txtWebsite.Text)
request.Credentials = CredentialCache.DefaultCredentials
response = request.GetResponse()
Dim dataStream As Stream = response.GetResponseStream()
Dim reader As New StreamReader(dataStream)

Dim responseFromServer As String = reader.ReadToEnd()
txtContent.Text = responseFromServer
reader.Close()
dataStream.Close()
response.Close()

End Sub
End Class

參考資料：MSDN WebRequest類別(System.Net)

Windows XP 無線網路WZC (Wireless Zero Configuration)服務啟動

2012-04-05T14:36:00.001+08:00

Windows XP 無線網路WZC (Wireless Zero Configuration)服務啟動

如果您的電腦或無線網路介面卡沒有隨附專屬的無線網路軟體，請依照下列步驟執行：
1. 按一下 [開始]，按一下 [執行]，輸入 ncpa.cpl，然後按一下 [確定]。
2. 按一下 [網路連線]。
3. 在 [網路連線] 中，按一下以選取您的無線連線，然後按一下 [變更這個連線的設定]。
4. 在 [無線網路] 索引標籤上，按一下以選取 [使用 Windows 來設定我的無線網路設定] 核取方塊。

如果要啟動 Wireless Zero Configuration 服務，請依照下列步驟執行：
1. 開啟[服務]。有兩種方式：
I. 按一下[開始]→[控制台]→[系統管理工具]→[服務]
II. 或是按一下 [開始]，按一下 [執行]，輸入：
%SystemRoot%\system32\services.msc /s，然後按一下 [確定]。
2. 按兩下 [Wireless Zero Configuration]。
3. 在 [啟動類型] 清單中，按一下 [自動]，然後按一下 [套用]。
4. 在 [服務狀態] 區域中，按一下 [啟動]，然後按一下 [確定]。

資料來源：Microsoft技術支援871122- http://support.microsoft.com/kb/871122

<分享>瀏覽器和網路世界20大須知

2011-06-04T22:29:00.002+08:00

瀏覽器和網路世界20大須知
http://20thingsilearned.com/

看過這本書，可以提升對網際網路的基本認知
包含瀏覽器、網頁語言以及網路安全部分
還有Google Chrome之所以快速、強大且好用的原因

＜Java＞ JVA410-成績計算

2011-04-19T20:13:00.001+08:00

本題重點：
1. 資料庫的讀取、Update

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import java.sql.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

public class JVA410 extends JFrame {
  //資料庫存取物件
  Connection connection;
  Statement statement;
  ResultSet resultSet;
  //GUI 物件
  Container container;
  JTextField averageScore;

  public JVA410()
  {
    super( "成績計算" );
      container = getContentPane();
      JPanel panel = new JPanel();

      JButton actionButton = new JButton("排名及計算平均");
    actionButton.addActionListener(
         new ActionListener() {
            public void actionPerformed( ActionEvent e ){
               computeRankAndAverage();
            }
         }
    );
      panel.add(actionButton, BorderLayout.WEST);

      JLabel label = new JLabel("    平均成績: ");
      panel.add(label, BorderLayout.CENTER);

      averageScore = new JTextField( 12 );
      panel.add(averageScore, BorderLayout.EAST);

      container.add(panel, BorderLayout.NORTH);
    // 載入JDBC驅動程式與連結資料庫
    try {
      Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" );
      connection = DriverManager.getConnection("jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=JVA04.mdb");
    }
    catch ( ClassNotFoundException e ) {
      System.out.println("Failed to load JDBC/ODBC driver." );
    }
    catch ( SQLException e ) {
      System.out.println( "Unable to connect" );
    }
    // 讀取並顯示資料表內容
    getTable();

    setSize( 500, 600 );
    setVisible(true);
  }

  private void computeRankAndAverage()
  {
    try {
      String query = "select 學號, 成績 from score order by 成績 desc";
      statement = connection.createStatement();
      resultSet = statement.executeQuery( query );
      Vector idOrderPairs = new Vector();
      // 請在此加入程式碼以完成下列工作:
      // 1、決定每一學生的名次，並將學號與名次的對應存到idOrderPairs裡，
      // 2、計算全班平均成績，
      // 3、將平均成績顯示在視窗的文字欄位裡。
      float sum = 0.0f;
      float avg = 0.0f;
      float score = 0.0f;
      int people=0 ,seq = 0;
      float max = 101.0f;

      while(resultSet.next()){
         int n[] = new int[2];
         n[0]=resultSet.getInt(1);
         score = resultSet.getFloat(2);

         people++;
         sum+=score;
         if(score == max){
            n[1]=seq;
         }else{
            seq = people;
            n[1]= seq;
         }
         max = score;
         //System.out.println(n[0]+" "+ n[1] +" "+ score);
         idOrderPairs.addElement(n);
      }
      avg = sumpeople;
      averageScore.setText(String.valueOf(avg));
      ////////////////////////////////////////////////////
      resultSet.close();
      statement.close();
      // 呼叫方法writeRank將名次寫入資料表
      writeRank(idOrderPairs);
      getTable();
    }
    catch ( SQLException e ) {
      e.printStackTrace();
    }
  }

  public void writeRank(Vector v){
    PreparedStatement prepStmt;

    try {
      prepStmt = connection.prepareStatement(
                         "update score set 名次=? where 學號=?");

      // 請在此加入程式碼，用Enumeration類別從idOrderPairs取出名次資料
      // 再用PreparedStatement物件prepStmt將資料寫入資料表。
      Enumeration em = v.elements();
      while(em.hasMoreElements()){
         int a[] = (int[])em.nextElement();
         prepStmt.setInt(1,a[1]);
         prepStmt.setInt(2,a[0]);
         //System.out.println(a[0]+" "+ a[1]);
         prepStmt.executeUpdate();
      }
      ///////////////////////////////////////////////////////////
      prepStmt.close();
    }
    catch(SQLException e) {
      System.out.println("SQLException");
    }

  }

  public void getTable()
  {

    try {
      String query = "select * from score";
      statement = connection.createStatement();
      resultSet = statement.executeQuery( query );
      displayResultSet();
      resultSet.close();
      statement.close();
    }
    catch ( SQLException e ) {
      e.printStackTrace();
    }
  }

  private void displayResultSet()  throws SQLException
  {
    Vector columnNames = new Vector();
    Vector rows = new Vector();
    try {
      // 請在此加入程式碼以顯示資料在視窗上。
      // 欄位「隨修」的資料以「是」或「否」表示。
      // 請用columnNames儲存欄位名稱，用rows儲存所有記錄。

      ResultSetMetaData rsm = resultSet.getMetaData();
      int len = rsm.getColumnCount();
      for(int i = 1 ; i <= len ; i++ ){
         columnNames.addElement(rsm.getColumnLabel(i));
      }

      while(resultSet.next()){
         Vector v = new Vector();
         v.addElement(resultSet.getLong(1));
         v.addElement((resultSet.getBoolean(2)"是"?:"否"));
         v.addElement(new Float(resultSet.getFloat(3)));
         v.addElement(new Integer(resultSet.getInt(4)));
         rows.addElement(v);
      }

      /////////////////////////////////////////////////
        JTable table = new JTable( rows, columnNames );
        JScrollPane scroller = new JScrollPane( table );
        container.add( scroller, BorderLayout.CENTER );
        container.validate();
    }
    catch ( SQLException e ) {
      e.printStackTrace();
    }
  }

  public static void main(String args[])
  {
    final JVA410 jva04 = new JVA410();

    jva04.addWindowListener(
      new WindowAdapter() {
        public void windowClosing( WindowEvent eve )
        {

          try{
            jva04.connection.close();
          }
          catch ( SQLException e ) {
            System.out.println( "Unable to disconnect" );
          }
          System.exit( 0 );
        }
      }
    );
  }

}

＜Java＞ JVA409-撲克牌發牌程式

2011-04-19T20:13:00.000+08:00

本題重點：
1. 訊息對話框(JOptionPane)

//import java.awt.* 用於使用事件處理
import java.awt.*;
import java.awt.event.*;

//swing成立視窗介面
import javax.swing.*;

public class JVA409 extends JFrame {
   private Card deck[]; //一個Card物件名為deck的Array
   private int currentCard;//currentCard變數代表發了幾張牌
   private JButton dealButton, shuffleButton;//兩個JButton
   private JTextField[] displayField;
           //因為一次要發六張牌所以要六個JTextField
   private JLabel statusLabel;//JLabel用來擺放currentCard的值

   //以下為DeckOfCard的建構子

   public JVA409()
   {
      super( "撲克牌發牌程式" );//繼承自父類別JFrame

      //請以下程式補足程式碼

      String suits[] ={"黑桃","紅心","方塊","梅花"};
      String faces[] ={"A","2","3","4","5","6","7","8","9","10","J","Q","K"}
                        ;

      deck = new Card[52]     ;  //跳去看Card這個class
      currentCard = 0    ;

      // populate deck with Card objects
      for (int i = 0; i< suits.length ; i++ )
      for(int j = 0 ; j< faces.length ; j++)
         deck[i*13+j] = new Card(faces[j],suits[i] );

      // set up GUI and event handling
      Container container = getContentPane();
      container.setLayout(new FlowLayout(FlowLayout.CENTER));

      dealButton = new JButton( "發牌" );
      dealButton.addActionListener(

         // anonymous inner class
         new ActionListener() {

            // 發六張牌
            public void actionPerformed( ActionEvent actionEvent )
            {
               //分別產生六個Card物件
         Card dealt[] = new Card[6];
         for(int i = 0 ; i < dealt.length ; i++){
               dealt[i] = dealCard();
               if(dealt[i]!=null)
                  currentCard ++;
            }
         for(int i = 0 ; i < dealt.length ; i++){
               if(dealt[i]!=null)
                  displayField[i].setText(dealt[i].toString());
               else
                  displayField[i].setText("");
            }


               //因為一次發六張牌最後一次發currentCard==47
               //當currentCard為47時沒有牌可以發了-->跳出errorMessage
            statusLabel.setText("已發張數: "+currentCard+"張" );
            if(currentCard>51){
               statusLabel.setText("請重新洗牌再進行發牌！" );
            }
            else if (currentCard>47){
                 JOptionPane.showMessageDialog(null,"沒牌可發了！");
            }

          }

         }  // end anonymous inner class

      ); // end call to addActionListener

      container.add( dealButton );//將發牌的JButton加入container

      shuffleButton = new JButton( "重新洗牌" );
      shuffleButton.addActionListener(

         // anonymous inner class
         new ActionListener() {

            // shuffle deck
            public void actionPerformed( ActionEvent actionEvent )
            {
            JOptionPane.showMessageDialog(null,"洗牌中...");
            statusLabel.setText("");
            shuffle();
            for(int i = 0 ; i < displayField.length ; i++){
               displayField[i].setText("洗好牌了!!");

            }
            }

         }  // end anonymous inner class

      ); // end call to addActionListener

      container.add( shuffleButton );//把洗牌的button加入container

      //建立六個JTextFiled
     displayField = new JTextField[6];
      for(int i = 0 ; i < displayField.length ; i++){
         displayField[i] = new JTextField(20);
         displayField[i].setEditable(false);
         container.add( displayField[i] );
      }

      //設定JTextField內容不可被改變

      statusLabel = new JLabel();
      container.add( statusLabel );

      setSize(275,250);
     setVisible(true);               // show window
   }

   // 這是洗牌的method
   public void shuffle()
   {
      currentCard = 0;

      // for each card, pick another random card and swap them
      for (int first = 0 ; first<deck.length ; first++) {
         int second = (int)(Math.random()*52.0);
         Card temp = deck[first];
         deck[ first ] = deck[second];
         deck[ second ] = temp;   //swap
      }
      dealButton.setEnabled( true );
   }

   // deal one card
   public Card dealCard()
   {
      if (currentCard<52)
      return deck[currentCard];
      else {
         dealButton.setEnabled( false );
         return null;
      }
   }

   // execute application
   public static void main( String args[] )
   {
      JVA409 app = new JVA409();

      app.addWindowListener(

         // anonymous inner class
         new WindowAdapter() {

            // terminate application when user closes window
            public void windowClosing( WindowEvent windowEvent )
            {
               System.exit( 0 );
            }

         }  // end anonymous inner class

      ); // end call to addWindowListener

   }  // end method main

}  // end class DeckOfCards

// 這個class 代表一張牌
class Card {
   private String face;
   private String suit;

   // 建構子實體化一張牌
   public Card( String cardFace, String cardSuit )
   {
      face = cardFace;
      suit = cardSuit;
   }

   // return String represenation of Card
   public String toString()
   {
      return   suit + face;
   }

}

＜Java＞ JVA408-員工基本資料表

2011-04-19T20:12:00.002+08:00

這題重點：
1. 表格的使用
2. AbstractTableModel類別改寫

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import   javax.swing.*;
import   javax.swing.table.*;
import   java.awt.*;

public class JVA408 extends JFrame{

   JTable myTable;
   JScrollPane myPanel;
   TableModel myModel;
   //JComboBox cbStd
   public JVA408(){

      setTitle("員工基本資料表");

      //建立 Table Model
      myModel = new EmployeeTable();
      myTable = new JTable(myModel);
      myPanel = new JScrollPane(myTable);

      //將表格物件和ScrollPanel加到JFrame物件上
      getContentPane().add(myPanel, "Center");

      //設定每一個ROW的高度
      myTable.setRowHeight(25);

      //初始ComboBox值，並加入表格中
      String std[] = {"博士","碩士","大學","專科"};
      JComboBox cbStd = new JComboBox(std);
      /*
################################
請在此處加上設定ComboBox的原始碼
################################
*/
      TableColumnModel tcm = myTable.getColumnModel(); //
      tcm.getColumn(2).setCellEditor(new DefaultCellEditor(cbStd));//

      //顯示JFrame
      setBounds(100, 100, 500, 200);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setVisible(true);
   }

   public static void main(String[] args){
      new JVA408();
   }
}

//***************自定表格模型*******************
class EmployeeTable extends AbstractTableModel{

//設定每一列的資料，設定欄位名稱
      /*
#####################################
請在此處加上設定Table原始資料的程式碼
#####################################
*/
   String header[] = {"員工編號","姓名","學歷","姓名","備考"};
   Object obj[][];

   public   EmployeeTable(){
      obj = new Object[][]{
         new Object[]{"3011","古怡芳","博士",false,""},
         new Object[]{"3012","梁金龍","碩士",true,""},
         new Object[]{"3013","林庭羽","大學",false,""},
         new Object[]{"3014","陳億","碩士",true,""},
         new Object[]{"3015","陳淑卿","大學",false,""},
      };
   }

      /*
##############################################################
請在此處加上顯示Table原始內容的程式碼，您可以考慮重寫下列方法：
一、getRowCount()
二、getColumnCount()
三、getValueAt()
四、getColumnClass
五、getColumnName
六、isCellEditable
##############################################################
*/
   public int getRowCount(){
      return obj.length;
   }
   public int getColumnCount(){
      return obj[0].length;
   }
   public Object getValueAt(int i, int j){
      return obj[i][j];
   }
   public Class getColumnClass(int j){
      return obj[0][j].getClass();
   }
   public String getColumnName(int j){
      return header[j];
   }
   public boolean isCellEditable(int i ,int j){
      if(j==2||j==3||j==4)
         return true;
      return false;
   }
   public void setValueAt(Object o,int i,int j){
      obj[i][j] = o;
   }

}

＜Java＞ JVA407-五彩拼盤

2011-04-19T20:12:00.001+08:00

這題重點：
1. 顏色選擇器(JColorChooser)
2. 繪製框線

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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JVA407 extends JFrame{
  public static void main(String args[]){
    JVA407 cd=new JVA407();
  }
  public JVA407(){
    super("五彩拼盤");
    Container c = getContentPane();
    c.add(new JLabel("請點選方格以進行背景色設定："),"North");
    JPanel p = new JPanel();

   //請在此撰寫產生表格程式
   p.setLayout(new GridLayout(5,5));
   p.setBorder(BorderFactory.createLineBorder(Color.blue,5)); //創建一個具有指定顏色/寬度的線邊框

   //請在此撰寫產生表格程式

   for(int i = 0 ; i<25 ; i++){
      p.add(new ColorPanel());
   }
    c.add(p);
    ////////////////////////////////////////////
   setSize(250,250);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setVisible(true);
  }
  class ColorPanel extends JPanel{
    JPanel jpn = new JPanel();
    public ColorPanel(){
         //請在此撰寫表格相關程式
      setBorder(BorderFactory.createLoweredBevelBorder()); // 創建一個具有凹入斜面邊緣的邊框
      setBackground(Color.yellow);
      //請在此撰寫表格相關程式

      addMouseListener(new MouseAdapter(){
        public void mouseClicked(MouseEvent me){

      //請在此撰寫產生顏色對話方塊程式
      Color c = JColorChooser.showDialog(ColorPanel.this,"請選擇方格之背景顏色",getBackground()); //
      if (c!=null){
         setBackground(c);
         repaint();
      }
      //請在此撰寫產生顏色對話方塊程式

        }
      });
    }
  }
}

＜Java＞ JVA406-檔案讀取器

2011-04-19T20:12:00.000+08:00

這題重點：
1. 進度器類別的使用
(ProgressMonitorInputStream、ProgressMonitor)

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import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;

public class JVA406 implements ActionListener,Runnable
{
    JFrame f = null;
    JLabel label = null;
    JTextArea textarea = null;
    JFileChooser fileChooser = null;
     Thread athread;

    public JVA406()
    {
        f = new JFrame("檔案讀取器");
        Container contentPane = f.getContentPane();
        textarea = new JTextArea();
        JScrollPane scrollPane = new JScrollPane(textarea);
        scrollPane.setPreferredSize(new Dimension(350,350));
        JButton b = new JButton("Read File");
        b.addActionListener(this);
        label = new JLabel(" ",JLabel.CENTER);
       //使用fileChooser元件,讓user可以選擇檔案
        fileChooser = new JFileChooser();

        contentPane.add(label,BorderLayout.NORTH);
        contentPane.add(scrollPane,BorderLayout.CENTER);
        contentPane.add(b,BorderLayout.SOUTH);

      f.pack();
        f.setVisible(true);

        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }

    public static void main(String[] args) {
        new JVA406();
    }

    public void actionPerformed(ActionEvent e)
    { //請在此撰寫程式碼
      //按下 "read file" button後,如何去啟動thread,請寫上
      athread = new Thread(this);
      athread.start();
    }

    public void run()
    {
        File file = null;
        int result = fileChooser.showOpenDialog(f);

        textarea.setText("");
   /////////////////////////////////////////////////
        if (result == JFileChooser.APPROVE_OPTION)
        {
         file = fileChooser.getSelectedFile();
         label.setText("你所選擇的檔案名稱為："+file.getName());
        }
        else if(result == JFileChooser.CANCEL_OPTION)
        {
         label.setText("你沒有選擇任何檔案");
        }
   ///////////////////////////////////////////
        FileInputStream inputStream;

        if(file != null)
        {
            try{
                inputStream = new FileInputStream(file);
            }catch(FileNotFoundException fe){
                label.setText("File Not Found");
                return;
            }
   //請在此撰寫程式碼
   //轉成字元後顯示在textarea上,並作出一個進度器(Progress Bar)
   //顯示出目前讀取檔案的進度為何?
         ProgressMonitorInputStream pmi;

         pmi = new ProgressMonitorInputStream(f , "檔案讀取中..." , inputStream);
         ProgressMonitor pm = pmi.getProgressMonitor();

         pm.setMillisToDecideToPopup(10);
         pm.setMillisToPopup(1);
         int j ;
         try{
            while((j=pmi.read())!=-1){
               textarea.append(String.valueOf((char)j));
               Thread.sleep(5L);
               if(pm.isCanceled()){
                  label.setText("檔案讀取中斷...");
                  break;
               }
            }

         }catch(Exception e){
            label.setText(file.getName()+"讀取失敗");
         }

   //////////////////////////////////////////////////////////
      }
   }
}

＜Java＞ JVA405-資料庫瀏覽器

2011-04-19T20:11:00.000+08:00

這題重點：
1. 使用JAVA讀取MDB資料庫
2. 在JAVA中使用SQL語法，搜尋資料庫
3. 表格的建立

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import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import java.applet.*;
import javax.swing.border.*;
import javax.swing.table.DefaultTableModel;

import java.io.*;
import java.util.*;
import java.sql.*;

public class JVA405 extends JFrame {
  JButton jbutton = new JButton();
  JTable jtable = new JTable();
  JTextField jtextfield = new JTextField();

  // Main method
  public static void main(String[] args) {
    try {
      UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
    }
    catch(Exception e) {
      e.printStackTrace();
    }

    new JVA405();
  }

  // 建構函式
  public JVA405() {
    super("資料庫瀏覽器");

    Container contentPane = getContentPane();
    contentPane.setLayout(new BorderLayout());

     JLabel jlabel = new JLabel("SQL指令:");

    jtextfield.setText("select * from Customers");

    jbutton.setSelected(true);
    jbutton.setText("執行SQL");
    jbutton.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jbutton_actionPerformed(e);
      }
    });

      // 捲軸
   //////////////////////////////////////////////////
   JScrollPane jscrollpane = new JScrollPane(jtable,20,30);

   //////////////////////////////////////////////////

     JPanel jpanel = new JPanel(new BorderLayout());

    jpanel.add(jlabel, BorderLayout.WEST);
    jpanel.add(jtextfield, BorderLayout.CENTER);
    jpanel.add(jbutton, BorderLayout.EAST);
    contentPane.add(jpanel, BorderLayout.NORTH);
    contentPane.add(jscrollpane, BorderLayout.CENTER);

    // Center the frame
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = this.getSize();
    if (frameSize.height > screenSize.height)
      frameSize.height = screenSize.height;
    if (frameSize.width > screenSize.width)
      frameSize.width = screenSize.width;
    this.setLocation((screenSize.width - frameSize.width)  2, (screenSize.height - frameSize.height)  2);

    this.validate();
    this.setSize(new Dimension(400, 300));
    this.setVisible(true);

      this.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent e) {
            System.exit(0);
         }
      });
  }

  void jbutton_actionPerformed(ActionEvent e) {

      ////////////////////////////////////////////////////
      String dbDriver = "sun.jdbc.odbc.JdbcOdbcDriver" ;
      String dbURL = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=JVA04.mdb" ;
      Connection con = null;
      ResultSet rs = null;

      DefaultTableModel dtm = new DefaultTableModel();
      jtable.setModel(dtm);
      //jtable.setAutoResizeMode(0);

      String query = jtextfield.getText();
      if(query.trim().equals("")){
         JOptionPane.showMessageDialog(this,"請輸入SQL指令","資料庫瀏覽器",0);
         return;
      }


      try {
         Class.forName(dbDriver);      //載入JDBC驅動程式
         con = DriverManager.getConnection(dbURL);   //取得與資料庫的連線
         Statement s = con.createStatement();      //利用Statement物件，用來存放進度搜尋用的SQL指令

         //執行搜尋指令存放至ResultSet
         rs = s.executeQuery(query);
         //if(s.execute(query)){
         // rs = s.getResultSet();
            ResultSetMetaData rsm = rs.getMetaData();
            int col = rsm.getColumnCount();
            for(int i = 1 ; i <=col ; i++){
               dtm.addColumn(rsm.getColumnLabel(i));
            }

            String as[] = new String[col];
            while(rs.next()){
               for(int i = 1; i<=col ; i++){
                  String str = rs.getString(i);
                  if(str == null)
                     str="";
                  as[i-1] = str;
               }
               dtm.addRow(as);

            }

         //}

      }catch(SQLException sq1){
         JOptionPane.showMessageDialog(this,"找不到資料","資料庫瀏覽器",0);
         return;
      }
      catch (Exception ex1) {
         ex1.printStackTrace();
      }
      finally {
         try {
            if(rs!=null)
               rs.close();
            con.close();
         }
         catch (Exception ex2) {
            ex2.printStackTrace();
         }
      }
      ///////////////////////////////////////////////////////
  }
}

＜Java＞ JVA404-簡易記事本

2011-04-19T20:10:00.000+08:00

這題重點：
1. TextArea的剪下、複製、貼上功能
2. 檔案選擇器(JFileChooser)的讀檔、存檔方法

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//############################# JVA404.java ###############################
/*
建立一個簡單記事本，並且有「開新檔案」、「開啟舊檔」、「離開」等三項功能
自行建立「儲存檔案」、「複製」、「剪下」、「貼上」等功能
*/

import javax.swing.*;
import javax.swing.border.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;

public class JVA404 extends JFrame {

  Container c = null;

  public JVA404(String title) {  //定義JVA404類別的建構子

    super(title);
    c = this.getContentPane();
    c.setLayout(new BorderLayout());

    final JTextArea t = new JTextArea();
    t.setLineWrap(true);

    JScrollPane s = new JScrollPane(t);
    c.add(s, BorderLayout.CENTER);

    final JFileChooser fc = new JFileChooser();

    JMenuBar mb;
    JMenu fmi;    //檔案
    JMenuItem nmi;  //開新檔案
    JMenuItem omi;  //開啟舊檔
    JMenuItem smi;  //儲存檔案
    JMenuItem exmi;  //離開

    JMenu emi;    //編輯
    JMenuItem cmi;  //複製
    JMenuItem pmi;  //貼上
    JMenuItem cutmi;  //剪下

    mb = new JMenuBar();
    mb.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
    setJMenuBar(mb);

    fmi = new JMenu("檔案");

    //建立「開新檔案」功能，定義事件，並加入選單中
    nmi = new JMenuItem("開新檔案");

    nmi.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        t.setText("");
      }
    });

    fmi.add(nmi);

    //建立「開啟舊檔」功能，定義事件，並加入選單中
    omi = new JMenuItem("開啟舊檔");

   omi.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
         int yesornot = fc.showOpenDialog(JVA404.this);
         if(yesornot == JFileChooser.APPROVE_OPTION){
            try{
               String line;
               File f = fc.getSelectedFile();
               BufferedReader br = new BufferedReader(new FileReader(f.getAbsolutePath()));
               t.setText(br.readLine());
               while( (line = br.readLine()) != null){
                  t.append("\n" + line);
               }
               br.close();
            }catch(IOException ioe){
            }
         }
      }
   });

    fmi.add(omi);

    //建立「儲存檔案」功能，定義事件，並加入選單中
    smi = new JMenuItem("儲存檔案");

     //
     //##########################################################
     // 請在此處加入「儲存檔案」的處理程序
     //##########################################################
     //
   smi.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
         try{
            int op;
            op = fc.showSaveDialog(JVA404.this);
            if(op == JFileChooser.APPROVE_OPTION){
               File f = fc.getSelectedFile();
               BufferedWriter bw = new BufferedWriter(new FileWriter(f.getAbsolutePath())));
               String lines[] = t.getText().split("\n");
               for(int i = 0 ; i<lines.length ; i++){
                  bw.write(lines[i]);
                  bw.newLine();
               }
               bw.close();
            }
         }catch(IOException ioe){
            ioe.printStackTrace();
         }

      }
   });

    fmi.add(smi);

    fmi.addSeparator();

    //建立「離開」功能，定義事件，並加入選單中
    exmi = new JMenuItem("離開");

    exmi.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
          System.exit(0);
      }
    });

    fmi.add(exmi);

    mb.add(fmi);

    emi = new JMenu("編輯");

   //建立「複製」功能，定義事件，並加入選單中
    cmi = new JMenuItem("複製");

      //
      //##########################################################
      // 請在此處加入「複製」的處理程序
      //##########################################################
      //
   cmi.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
         t.copy();
      }
   });

    emi.add(cmi);

   //建立「貼上」功能，定義事件，並加入選單中
    pmi = new JMenuItem("貼上");

      //
      //##########################################################
      // 請在此處加入「貼上」的處理程序
      //##########################################################
      //
   pmi.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
         t.paste();
      }
   });

    emi.add(pmi);

   //建立「剪下」功能，定義事件，並加入選單中
    cutmi = new JMenuItem("剪下");

      //
      //##########################################################
      // 請在此處加入「剪下」的處理程序
      //##########################################################
      //
   cutmi.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
         t.cut();
      }
   });

    emi.add(cutmi);

    mb.add(emi);

    //定義框架（視窗）關閉時的處理
    this.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });

    try {
      UIManager.setLookAndFeel("com.sun.swing.plaf.gtk.GTKLookAndFeel");
      SwingUtilities.updateComponentTreeUI(this);

    } catch (Exception e) {   }

    this.setSize(400, 250);
    this.setVisible(true);
  }

  public static void main(String s[]) {
    //建立JVA404類別的實體
    JVA404 App = new JVA404("簡易記事本");
  }
}

＜Java＞ JVA403-護士排班表

2011-04-19T20:09:00.001+08:00

重點：
1. 存讀檔
2. 即時取得ComboBox內容並計算

＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

import java.awt.*;
import java.awt.event.*;
import java.io.*;
public class JVA403 extends Frame implements ItemListener
{
  BufferedWriter bw = null;
  BufferedReader br = null;

  //護士名字
  String name[] =new  String[4];
  String weekDay[] = {"週一","週二","週三","週四","週五"};

  //Panel pn1 包含了 Panel pn1a 及 Panel pn1b
  Panel pn1 = new Panel();

  //pn1a 用來放排班表
  Panel pn1a = new Panel();
  Choice chAM[] = new Choice[5];   //週一至週五早班
  Choice chPM[] = new Choice[5];   //週一至週五晚班
  Choice chNigh[] = new Choice[5]; //週一至週五夜班

  //pn1b 放的是每位護士的班次統計表
  Panel pn1b = new Panel();
  Label lname[]  = new Label[4];    //顯示每位護士名字
  int AM[] = new int[4];            //每一位護士早班次數
  int PM[] = new int[4];            //每一位護士晚班次數
  int Nigh[] = new int[4];            //每一位護士夜班次數
  Label lbAM[]   = new Label[4];    //顯示每一位護士早班次數
  Label lbPM[]   = new Label[4];    //顯示每一位護士晚班次數
  Label lbNigh[] = new Label[4];    //顯示每一位護士夜班次數

  //pn3 是最下方的按鈕區
  Panel pn3 = new Panel();
  Button b1 = new Button("輸出");
  Button b2 = new Button("離開");

  public JVA403()
  {
    super("急診科護士排班表");
    addWindowListener(new WinListener());
  }
  public static void main(String[] args)
  {
    JVA403 jv04 = new JVA403();
    jv04.setup();
    jv04.setSize(400,300);
    jv04.setVisible(true);
  }

  void setup()
  {
    //將護士的名單讀入
   try{
   BufferedReader br = new BufferedReader(new FileReader("JVA04-1.txt"));
   String str = "";
   int i = 0;
   do{
      str = br.readLine();
      if(str == null)
         break;
      name[i] = str;
      i++;
   }while(true);
   }catch(FileNotFoundException fe){
      System.out.println("找不到檔案");
   }catch(IOException ie){
      System.out.println("IOException");
   }catch(Exception ee){

   }
    //請您完成這部份
    setpn1();
    setpn3();
    add(pn1);
    add(pn3,BorderLayout.SOUTH);

  }

  //設定排班表內容
  void setpn1()
  {
    pn1a.setLayout(new GridLayout(4,0));
    pn1a.add(new Label(" "));
    pn1a.add(new Label(weekDay[0]));
    pn1a.add(new Label(weekDay[1]));
    pn1a.add(new Label(weekDay[2]));
    pn1a.add(new Label(weekDay[3]));
    pn1a.add(new Label(weekDay[4]));
    pn1a.add(new Label("早班"));

    for(int h=0; h<chAM.length; h++)
    {
       chAM[h] = new Choice();
       chPM[h] = new Choice();
       chNigh[h] = new Choice(); //週一至週五夜班
       //將名單放入下拉式選單
       //請您完成這部份
      for(int i = 0;  i<name.length ; i++ ){
         chAM[h].add(name[i]);
         chPM[h].add(name[i]);
         chNigh[h].add(name[i]);
      }
      chAM[h].addItemListener(this);
      chPM[h].addItemListener(this);
      chNigh[h].addItemListener(this);

    }

    pn1a.add(chAM[0]);
    pn1a.add(chAM[1]);
    pn1a.add(chAM[2]);
    pn1a.add(chAM[3]);
    pn1a.add(chAM[4]);
    pn1a.add(new Label("晚班"));
    pn1a.add(chPM[0]);
    pn1a.add(chPM[1]);
    pn1a.add(chPM[2]);
    pn1a.add(chPM[3]);
    pn1a.add(chPM[4]);
    pn1a.add(new Label("夜班"));
    pn1a.add(chNigh[0]);
    pn1a.add(chNigh[1]);
    pn1a.add(chNigh[2]);
    pn1a.add(chNigh[3]);
    pn1a.add(chNigh[4]);
    //設定班別統計表
    pn1b.setLayout(new GridLayout(4,4));
    for(int a=0; a<lname.length; a++)
    {
      lname[a] = new Label(name[a]);
    }
    pn1b.add(new Label(" "));
    pn1b.add(lname[0]);
    pn1b.add(lname[1]);
    pn1b.add(lname[2]);
    pn1b.add(lname[3]);
    pn1b.add(new Label("早班"));
    lbAM[0] = new Label("");
    lbAM[1] = new Label("");
    lbAM[2] = new Label("");
    lbAM[3] = new Label("");
    pn1b.add(lbAM[0]);
    pn1b.add(lbAM[1]);
    pn1b.add(lbAM[2]);
    pn1b.add(lbAM[3]);
    pn1b.add(new Label("晚班"));
    lbPM[0] = new Label("");
    lbPM[1] = new Label("");
    lbPM[2] = new Label("");
    lbPM[3] = new Label("");
    pn1b.add(lbPM[0]);
    pn1b.add(lbPM[1]);
    pn1b.add(lbPM[2]);
    pn1b.add(lbPM[3]);
    pn1b.add(new Label("夜班"));
    lbNigh[0] = new Label("");
    lbNigh[1] = new Label("");
    lbNigh[2] = new Label("");
    lbNigh[3] = new Label("");
    pn1b.add(lbNigh[0]);
    pn1b.add(lbNigh[1]);
    pn1b.add(lbNigh[2]);
    pn1b.add(lbNigh[3]);
    pn1.setLayout(new GridLayout(0,1));
    pn1.add(pn1a);
    pn1.add(pn1b);
  }

  void setpn3()
  {
     b1.addActionListener(new act());
     pn3.add(b1);

     b2.addActionListener(new act());
     pn3.add(b2);
  }

  //對Item的變動作出即時反應
  public void itemStateChanged(ItemEvent e)
  {
    //先將資料清空
    for(int i=0; i<AM.length; i++)
    {
      AM[i] =0;
      PM[i] =0;
      Nigh[i] = 0;
    }
    //計算每一位護士早班次數
    //請您完成這部份
   for(int i=0 ; i<chAM.length ; i++){
      for(int j=0 ; j<name.length ; j++){
         if(chAM[i].getSelectedItem().equals(name[j])){
            AM[j]++;
         }
      }
   }

    //計算每一位護士晚班次數
    //請您完成這部份
   for(int i=0 ; i<chPM.length ; i++){
      for(int j=0 ; j<name.length ; j++){
         if(chPM[i].getSelectedItem().equals(name[j])){
            PM[j]++;
         }
      }
   }

    //計算每一位護士夜班次數
    //請您完成這部份
   for(int i=0 ; i<chNigh.length ; i++){
      for(int j=0 ; j<name.length ; j++){
         if(chNigh[i].getSelectedItem().equals(name[j])){
            Nigh[j]++;
         }
      }
   }
    //將資料填入畫面
    for(int i=0; i<AM.length; i++)
    {
      lbAM[i].setText("" + AM[i]);
      lbPM[i].setText("" + PM[i]);
      lbNigh[i].setText("" + Nigh[i]);
    }
  }

  //建立一個用來處理按鈕的 ActionListener inner class
  class act implements ActionListener
  {
    public void actionPerformed(ActionEvent e)
    {
        if(e.getSource() == b2)
        {
           System.exit(0);
        }
        else if(e.getSource() == b1)
        {
           StringBuffer sbAM = new StringBuffer("");
           StringBuffer sbPM = new StringBuffer("");
           StringBuffer sbNight = new StringBuffer("");
           //請撰寫這部份,將排班資料寫入檔案
           try
           {
            BufferedWriter bw = new BufferedWriter(new FileWriter("JVA04.txt"));
            bw.write("值班通知書");
            bw.newLine();
            bw.newLine();
            for(int i = 0 ; i<name.length ; i++){
               sbAM.delete(0,sbAM.length());
               sbPM.delete(0,sbPM.length());
               sbNight.delete(0,sbNight.length());
               for(int h = 0 ; h < chAM.length ; h++){
                  if(chAM[h].getSelectedItem().equals(name[i])){
                     sbAM.append(" "+weekDay[h]);
                  }
                  if(chPM[h].getSelectedItem().equals(name[i])){
                     sbPM.append(" "+weekDay[h]);
                  }
                  if(chNigh[h].getSelectedItem().equals(name[i])){
                     sbNight.append(" "+weekDay[h]);
                  }
               }
               bw.write(name[i]+":");
               bw.newLine();
               bw.newLine();
               bw.write("早班:");
               bw.write(" "+sbAM);
               bw.newLine();
               bw.write("晚班:");
               bw.write(" "+sbPM);
               bw.newLine();
               bw.write("夜班:");
               bw.write(" "+sbNight);
               bw.newLine();
               bw.newLine();

            }
            bw.close();

           }
           catch (Exception ex) {
              ex.printStackTrace();
           }
        }
     }
  }

  /* 覆寫 WindowAdapter 中的 windowClosing()
讓關閉視窗的按鈕有作用
*/
  class WinListener extends WindowAdapter
  {
    public void windowClosing(WindowEvent e)
    {
      e.getWindow().dispose();
      System.exit(0);
    }
  }
}

＜Java＞ JVA402-文字檔合併器

2011-04-19T20:08:00.001+08:00

這題的題庫已經是完整的程式碼......
我也不知道該寫什麼= =

＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JVA402 extends JFrame implements ActionListener
{
  //第一個JPanel用來放置所選取檔案
  JPanel pn1 = new JPanel();
  //顯示訊息的標籤
  JLabel msg = new JLabel("請選取兩個 txt 檔來做合併");
  //按鈕上的圖示
  ImageIcon  image1 = new ImageIcon("JVA04-1.gif");
  ImageIcon  image2 = new ImageIcon("JVA04-1.gif");
  ImageIcon  image3 = new ImageIcon("JVA04-2.gif");
  //選取檔案的按鈕
  JButton bn1 = new JButton("選取要合併的第一個檔案",image1);
  JButton bn2 = new JButton("選取要合併的第二個檔案",image2);
  JButton bn3 = new JButton("選取合併後要存入的檔案",image3);
  //顯示所選取檔案名稱
  JTextField tfIn[] = {new JTextField(), new JTextField()};
  //顯示所要輸出的檔案名稱
  JTextField tf3 = new JTextField(3);

  //第二個JPanel用來放置按鈕
  JPanel pn2 = new JPanel();
  JButton bnOK   = new JButton("確定");
  JButton bnExit = new JButton("離開");
  //合併檔案所用的 IO 類別
  JFileChooser jfc = new JFileChooser(".");
  InputStream is;
  SequenceInputStream sis;
  File outputFile;
  FileOutputStream out;

  public JVA402( ) { addWindowListener(new WinListener()); }

  public static void main(String[] args) throws IOException
  {
    JVA402 test = new JVA402();
    test.setTitle("文字檔合併器");
    test.setup();
    test.setSize(300,200);
    test.setVisible(true);
  }

  //設定畫面元件及 Listener
  void setup()
  {
    Container content = this.getContentPane();
    pn1.setLayout(new GridLayout(0,1));
    pn1.add(msg);
    bn1.addMouseListener(new MouseListen());
    bn2.addMouseListener(new MouseListen());
    bn3.addMouseListener(new MouseListen());
    bn1.addActionListener(this);
    bn2.addActionListener(this);
    bn3.addActionListener(this);
    pn1.add(bn1);
    pn1.add(tfIn[0]);
    pn1.add(bn2);
    pn1.add(tfIn[1]);
    pn1.add(bn3);
    pn1.add(tf3);
    content.add(pn1);
    bnOK.addMouseListener(new MouseListen());
    bnExit.addMouseListener(new MouseListen());
    bnOK.addActionListener(this);
    bnExit.addActionListener(this);
    pn2.add(bnOK);
    pn2.add(bnExit);
    content.add(pn2,BorderLayout.SOUTH);
  }

  // 顯示開啟檔案對話方塊,並將所選取的檔案名稱放入 JTextField tfIn[] 中
  void selectInFile(int i)
  {
     //回傳值為 0 代表使用者不是選擇 Cancel
     if(jfc.showOpenDialog(this) == 0)
     {
         tfIn[i-1].setText(jfc.getSelectedFile().toString());
     }
  }

  // 顯示開啟檔案對話方塊,並將所選取的檔案名稱放入 JTextField tf3 中
  void selectOutFile()
  {
     //回傳值為 0 代表使用者不是選擇 Cancel
     if(jfc.showOpenDialog(this) == 0)
     {
        tf3.setText(jfc.getSelectedFile().toString());
     }
  }

  //進行檔案合併的動作
  void combineFiles()
  {
    try
    {
       InputStream in0 = new FileInputStream(tfIn[0].getText().trim());
       InputStream in1 = new FileInputStream(tfIn[1].getText().trim());
       sis = new SequenceInputStream(in0, in1);
       outputFile = new File(tf3.getText().trim());
       out = new FileOutputStream(outputFile);
       int c;
       while((c = sis.read()) != -1)
       {
         System.out.write(c);
         out.write(c);
       }
       sis.close();
       out.close();
       msg.setText("檔案合併完成");
       tfIn[0].setText("");
       tfIn[1].setText("");
       tf3.setText("");
    }
    catch (Exception ex)
    {
      msg.setText("檔案合併沒成功");
    }
  }

  //對按鈕的動作做出回應
  public void actionPerformed(ActionEvent e)
  {
       if(e.getSource() == bnExit)
       {
          //結束程式
          dispose();
          System.exit(0);
       }
       else if(e.getSource() == bnOK)
       {
          //進行檔案合併
          combineFiles();
        }
        else if(e.getSource() == bn1)
        {
           // 顯示開啟檔案對話方塊,並將所選取的檔案名稱放入 JTextField tf[0] 中
           selectInFile(1);
        }
        else if(e.getSource() == bn2)
        {
           // 顯示開啟檔案對話方塊,並將所選取的檔案名稱放入 JTextField tfIn[1] 中
           selectInFile(2);
        }
        else if(e.getSource() == bn3)
        {
          // 顯示開啟檔案對話方塊,並將所選取的檔案名稱放入 JTextField tf3 中
          selectOutFile();
        }
  }

  //用來讓JFrame可以正常結束
  class WinListener extends WindowAdapter
  {
      public void windowClosing(WindowEvent e)
      {
        e.getWindow().dispose();
        System.exit(0);
      }
   }

  //讓按鈕在滑鼠進入會變色
  class MouseListen extends MouseAdapter
  {
    public void mouseEntered(MouseEvent e)
    {
       ((JButton) e.getSource()).setBackground(Color.yellow);
    }
    public void mouseExited(MouseEvent e)
    {
       ((JButton) e.getSource()).setBackground(new Color(204, 204, 204));
    }
  }

}

＜Java＞ JVA401-英文一點通

2011-04-19T20:08:00.000+08:00

(這題的版面配置沒寫好圖形有些醜)

重點：
1. 讀檔
2. 字串處理
3. map的方法

＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

import java.util.* ;
import java.io.* ;
import java.awt.* ;
import java.awt.event.* ;
public class JVA401 extends Frame implements ActionListener
{
   TextArea origin = new TextArea("請在此輸入欲轉換之英文") ;
   TextArea target = new TextArea("") ;
   Button process = new Button("開始翻譯") ;
   Button clear = new Button("清除文字") ;
   public JVA401()
   {
         //請在此撰寫程式
      super("英文一點通");
      Panel p = new Panel();
      p.add(process);
      p.add(clear);
      setLayout(new GridLayout(3,1));   //配置
      add(origin);
      add(target);
      add(p);

         //請在此撰寫程式
      process.addActionListener(this);
      clear.addActionListener(this);
      setSize(300,500);
      addWindowListener(new WindowAdapter(){
         public void windowClosing(WindowEvent e){
            e.getWindow().dispose();
            System.exit(0);
         }
      });
   }
   public static void main(String args[])
   {
      JVA401 eng = new JVA401() ;
      eng.setVisible(true) ;
   }
   public void actionPerformed(ActionEvent e)
   {
      String cmd = e.getActionCommand() ;
      if(cmd.equals("開始翻譯"))
      {
         HashMap map = new HashMap();
         try{
         BufferedReader br = new BufferedReader(new FileReader("JVA401.cfg"));
         String str = "";

         do{
            str = br.readLine();
            if(str == null)
               break;
            String lan[] = str.split("-");
            map.put(lan[0].toLowerCase(),lan[1]);

         }while(true);
         }catch(FileNotFoundException fe){
            origin.setText("找不到對照檔 JVA401.cfg");
            target.setText("找不到對照檔 JVA401.cfg");
         }catch(IOException ie){
            target.setText("IOException");
         }

         //取得使用者的輸入
         String unparsed = origin.getText();
         String words[] = unparsed.split(" ");

         //開始置換,並秀在螢幕上,注意,要將裡頭所有字轉成小寫,方能不管大小寫
         String result = "";
         for(int i = 0; i<words.length ; i++){
            Object o = map.get(words[i].toLowerCase());
            if( o != null )
               result += (String)o;
            else
               result += words[i];
   result += " ";
         }
         target.setText("");
         target.setText(result);



      }else if(cmd.equals("清除文字"))
      {
                  //請在此撰寫程式
         origin.setText("");
         target.setText("");

      }
   }

}

參考網頁：
Java A+

＜Java＞ JVA310-年齡計算

2011-03-26T16:03:00.000+08:00

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
public class JVA310 extends JFrame{
        private JPanel jp1; //放置輸入出生年月日元件
        private JTextField ty,tm,td;
        private JLabel label1,label2,label3,label4;
        private JButton b;
        private int year,month,day;
        private int yearNow,monthNow,dayNow;
        private int result;
   private int md[]={0,31,29,31,30,31,30,31,31,30,31,30,31};
        public JVA310(){
                super("計算年齡");
                Container con = getContentPane();
                jp1 = new JPanel();
                jp1.setLayout(new FlowLayout(FlowLayout.CENTER));
                //求得目前系統日期
                Calendar cal = Calendar.getInstance();
                //求得目前系統的西元年
                yearNow = cal.get(Calendar.YEAR);
                //求得目前系統的月份(一月會回傳0,故加1後才是真正的月份)
                monthNow = cal.get(Calendar.MONTH)+1;
                //求得目前系統的日期
                dayNow = cal.get(Calendar.DATE);

                //設定GUI
                label4 = new JLabel("請輸入出生年月日",JLabel.CENTER);
                con.add(label4,BorderLayout.NORTH);
                label1 = new JLabel("年(YYYY)");
                jp1.add(label1);
                ty= new JTextField(4);
                jp1.add(ty);
                label2 = new JLabel("月(MM)  ");
                jp1.add(label2);
                tm= new JTextField(4);
                jp1.add(tm);
                label3 = new JLabel("日(dd)  ");
                jp1.add(label3);
                td= new JTextField(4);
                jp1.add(td);
                con.add(jp1,BorderLayout.CENTER);
                b =  new JButton("計算結果");
                //該按鈕被按下時的事件驅動
                b.addActionListener(
                   new ActionListener(){
                        public void actionPerformed(ActionEvent e){
                            try{
   //檢查是否有欄位沒填入資料
   if((ty.getText()==null)||(tm.getText()==null)||(td.getText()==null)  )
   JOptionPane.showMessageDialog(null,"請輸入完整的出生年月日");
     else {
     //取得輸入的西元年
   year = Integer.parseInt(ty.getText());
     //取得輸入的月份
   month = Integer.parseInt(tm.getText());
     //取得輸入的日
   day = Integer.parseInt(td.getText());
   //檢查是否所輸入出生年月日不正確
     if( (year>yearNow)||(year<1)||(month>12)||(month<1) ) /
   JOptionPane.showMessageDialog(null,"所輸入的出生年月日不正確");
     else if(day>md[month] || day<1){
   JOptionPane.showMessageDialog(null,"所輸入的出生年月日不正確");
   }
     else
   {
     //計算實際年齡
     if( monthNow > month )
   result = yearNow - year ;
     else if( (monthNow == month)&&(dayNow>=day) )
   result = yearNow - year;
     else
   result = yearNow - year - 1  ;

     //印出實際年齡
   JOptionPane.showMessageDialog(null,"你現在的實際年齡為"+result+"歲");
   }
   }
   }catch(Exception ee){
   JOptionPane.showMessageDialog(null,"所輸入的出生年月日不正確");
   }
   }
   }
                );
                con.add(b,BorderLayout.SOUTH);

                //設定JFrame大小
                setSize(150,180);
                //讓JFrame不能設定大小
                setResizable(false);
                setVisible(true);
        }
        public static void main(String args[]){
                JVA310 age=new JVA310();
                //讓JFrame結束的事件驅動
                age.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        }
}

＜Java＞ JVA309-多彩圖形繪板

2011-03-26T16:02:00.001+08:00

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.geom.*;
public class JVA309 extends JFrame implements ActionListener{
  String figure="";
  Shape shape;
  ButtonGroup bg;
  JRadioButton rbn1,rbn2,rbn3;
  double x,y,r;
  JPanel p=new JPanel();
  public static void main(String args[]){
    JVA309 pm=new JVA309();
  }
  public JVA309(){
    super("多彩圖形繪板");
    setBackground(Color.yellow);
    Container c=getContentPane();
    rbn1=new JRadioButton("圓形");
    rbn2=new JRadioButton("扇形");
    rbn3=new JRadioButton("方形");
    rbn1.setOpaque(false);
    rbn2.setOpaque(false);
    rbn3.setOpaque(false);
    bg=new ButtonGroup();
    bg.add(rbn1);
    bg.add(rbn2);
    bg.add(rbn3);
    rbn1.addActionListener(this);
    rbn2.addActionListener(this);
    rbn3.addActionListener(this);
    //請在此撰寫JPanel設定
    p.setLayout(new FlowLayout(FlowLayout.CENTER));
    p.setBackground(Color.yellow);

    //p.add(new JLabel("選定圖形後在空白處拖曳滑鼠："));
    p.add(rbn1);
    p.add(rbn2);
    p.add(rbn3);
    c.add(p,"North");
    addMouseMotionListener(new MouseMotionAdapter(){
     //請在此撰寫滑鼠拖曳程式
      public void mouseDragged(MouseEvent me){
         x = me.getX();
         y = me.getY();
         repaint();
      }
    });
    setSize(500,400);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setVisible(true);
  }
  public void actionPerformed(ActionEvent ae){
    String cm=ae.getActionCommand();
    //請在此撰寫圖形判斷程式碼
   figure = (String)cm;
    //請在此撰寫圖形判斷程式碼
  }
  public void update(Graphics g){
    setBackground(Color.yellow);
    paint(g);
  }
  public void paint(Graphics g){
    Graphics2D g2d=(Graphics2D) g;

  //請在此撰寫圖形相關程式碼
   r = Math.random()*50.0;
    if(figure.equals("圓形")){
      shape = new Ellipse2D.Double(x,y,r,r);
    }else if(figure.equals("扇形")){
      shape = new Arc2D.Double(x,y,r,r,30D,120D,2);
    }else if(figure.equals("方形")){
      shape = new Rectangle2D.Double(x,y,r,r);
    }else{
      shape = new Ellipse2D.Double();
    }
   //請在此撰寫程式碼
    g2d.setColor(new Color(   (int)(Math.random()*255),
                     (int)(Math.random()*255),
                     (int)(Math.random()*255)));
    g2d.fill(shape);  //請下面撰寫程式
    rbn1.repaint();
    rbn2.repaint();
   rbn3.repaint();
  }
}

＜Java＞ JVA308-藝人音樂評等

2011-03-26T16:01:00.003+08:00

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class JVA308 extends JFrame{
        private JRadioButton button[][] = new JRadioButton[ 4 ][ 3 ];
         //new出12個JRadioButton
        private ButtonGroup radiogroup[] = new ButtonGroup[ 4 ];
         //new出4個ButtonGroup
        private RadioButtonHandler handler[] = new RadioButtonHandler[ 4 ];
         //new出4個RadioButtonGroup
        private JTextArea note;  //new出1個JTextArea
        private JPanel innerpanel, outerpanel, artistpanel;  //創造出兩個panel
        private JLabel bestlabel, showcommentlabel;  //new出2個JLabel
        private String character[][] = {
      { "王光良", "周杰倫", "張智成", "0" },            //男藝人的名字
      { "傷心地鐵", "若無其事", "光", "1" },            //王光良唱過的三首歌
      { "爸,我回來了", "雙截棍", "安靜", "2" },          //周杰倫唱過的三首歌
      { "刺心", "May I Love You", "重返寂寞", "3" } };  //張智成唱過的三首歌
        private String songinfo[][] = {
   { "這首是【傷心地鐵】\n\n音樂評等:★★★★★", "這首是【若無其事】\n\n音樂評等:★★★★☆", "這首是【光】\n\n音樂評等:★★★★☆" },
   { "這首是【爸，我回來了】\n\n音樂評等:★★★☆☆", "這首是【雙截棍】\n\n音樂評等:★★☆☆☆", "這首是【安靜】\n\n音樂評等:★★★★☆" },
   { "這首是【刺心】\n\n音樂評等:★★★☆☆", "這首是【May I Love You】\n\n音樂評等:★★☆☆☆", "這首是【重返寂寞】\n\n音樂評等:★★★★☆" } };
        static int choice = 1;  //switch case之用

        public JVA308()
        {
                super( "藝人音樂評等" );

                Container container = getContentPane();  //新增一個container

                //設定成GridLayout
                innerpanel = new JPanel( new GridLayout( 3, 1 ) );
                outerpanel = new JPanel( new GridLayout( 1, 2 ) );
                choice();

                outerpanel.add( innerpanel );  //把innerpanel加入outerpanel中

                note = new JTextArea();  //新增JTextArea
            //////////////////////////////////////////////////////////
                note.setLineWrap(true);                    //設定自動換行
                note.setText(songinfo[0][0]);
                note.setEditable(false);                    //設定不可編輯
            //////////////////////////////////////////////////////////
                Box box = Box.createHorizontalBox();
                box.add( new JScrollPane( note) );  //加上一個JScrollPane
                outerpanel.add( box );

                container.add( outerpanel );

                artistpanel = new JPanel( new GridLayout( 1, 3 ) );

                //呼叫addradiobutton這個method，輸入的參數型態是( String, JPanel)
                addradiobutton( character[ 0 ], artistpanel );
                container.add( artistpanel, BorderLayout.SOUTH );  //設定artistpanel的BorderLayout為SOUTH

                setSize( 300, 200 );  //設定大小
                setVisible(true);  //顯現出來
        }

        //這個method處理好所有有關JRadioButton的事情!
        public void addradiobutton( String s[], JPanel panel )
        {
                int temp = Integer.parseInt( s[ 3 ] );

                //新增3個JRadioButton
                button[ temp ][ 0 ] = new JRadioButton( s[ 0 ], true );
                panel.add(button[temp][0]);

                button[ temp ][ 1 ] = new JRadioButton( s[ 1 ], false );
                panel.add(button[temp][1]);

                button[ temp ][ 2 ] = new JRadioButton( s[ 2 ], false );
                panel.add(button[temp][2]);

                //把JRadioButton加進去handler裡面
                handler[ temp ] = new RadioButtonHandler();

                for( int count = 0; count < button[ temp ].length; count++ )
                        button[ temp ][ count ].addItemListener( handler[ temp ] );

                //然後再設成同一個ButtonGroup
                radiogroup[ temp ] = new ButtonGroup();

                for( int count = 0; count < button[ temp ].length; count++ )
                        radiogroup[ temp ].add( button[ temp ][ count ] );
        }

        public void choice()
        {
                innerpanel.removeAll();  //將所有innerpanel裡的元件移除掉

                //用switch case來判定三個人所唱的三首歌//
                switch( choice )
                {
                        case 1:
                          addradiobutton(character[1],innerpanel);
                     break;
                        case 2:
                          addradiobutton(character[2],innerpanel);
                     break;
                        case 3:
                            addradiobutton(character[3],innerpanel);
                     break;
                        default:
                      addradiobutton(character[1],innerpanel);
                     break;

                }
            ///////////////////////////////////////////
                innerpanel.validate();  //讓新加入innerpanel裡的元件出現
        }

        public static void main( String args[] )
        {
                JFrame.setDefaultLookAndFeelDecorated(true);  //讓整個JFrame看起來好看

                JVA308 newartist = new JVA308();  //new出一個artist的物件

                newartist.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );  //設定結束
        }

        //處理RadioButton的事件
        private class RadioButtonHandler implements ItemListener
        {
                public void itemStateChanged( ItemEvent event )
                {
               //////////////////////////////////////////////////
                        //當點選內容為藝人姓名
                    if(event.getSource() == button[0][0]){
                  choice = 1;
                  choice();
                  note.setText(songinfo[0][0]);
               }else if(event.getSource() == button[0][1]){
                  choice = 2;
                  choice();
                  note.setText(songinfo[1][0]);
               }else if(event.getSource() == button[0][2]){
                  choice = 3;
                  choice();
                  note.setText(songinfo[2][0]);
               }
                        //當點選內容為光良的歌
                    if(event.getSource() == button[1][0]){
                  note.setText(songinfo[0][0]);
               }else if(event.getSource() == button[1][1]){
                  note.setText(songinfo[0][1]);
               }else if(event.getSource() == button[1][2]){
                  note.setText(songinfo[0][2]);
               }
                        //當點選內容為周杰倫的歌
                    if(event.getSource() == button[2][0]){
                  note.setText(songinfo[1][0]);
               }else if(event.getSource() == button[2][1]){
                  note.setText(songinfo[1][1]);
               }else if(event.getSource() == button[2][2]){
                  note.setText(songinfo[1][2]);
               }
                        //當點選內容為張智成的歌
                    if(event.getSource() == button[3][0]){
                  note.setText(songinfo[2][0]);
               }else if(event.getSource() == button[3][1]){
                  note.setText(songinfo[2][1]);
               }else if(event.getSource() == button[3][2]){
                  note.setText(songinfo[2][2]);
               }

               ////////////////////////////////////////////
                        //結束處理內容
                }
        }
}

＜Java＞ JVA307-簡易瀏覽器

2011-03-26T16:01:00.002+08:00

這真的是一個很簡易的瀏覽器...

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.UIManager;
import javax.swing.plaf.metal.MetalLookAndFeel;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.text.html.*;
import java.io.*;
import java.net.*;

public class JVA307 extends JFrame implements HyperlinkListener {
   JTextField jURL = new JTextField();
   JEditorPane htmlPane = new JEditorPane();

  // Main method
  public static void main(String[] args) {
    try {
      UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
    }
    catch(Exception e) {
      e.printStackTrace();
    }

    new JVA307();
  }

  // 建構函式
  public JVA307() {
    super("簡易Web Browser瀏覽器");

    Container contentPane = getContentPane();
    contentPane.setLayout(new BorderLayout());

      JLabel jlabel1 = new JLabel();
    jlabel1.setText("URL:");
//////////////////////////////////////////////////////////
    jURL.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
            String url = jURL.getText();
            showHTML(url);
      }
    });
////////////////////////////////////////////////////////
   // JEditorPane
   htmlPane.setEditable(false);
   htmlPane.addHyperlinkListener(this);
//////////////////////////////////////////////////////////

      JPanel jpanel1 = new JPanel();
    jpanel1.setLayout(new BorderLayout());
    jpanel1.setPreferredSize(new Dimension(10, 35));

      JPanel jpanel2 = new JPanel();
    jpanel2.setBorder(BorderFactory.createEmptyBorder(0,5,0,0));
    jpanel2.setPreferredSize(new Dimension(35, 10));

      JPanel jpanel3 = new JPanel();
    jpanel3.setLayout(new BorderLayout());
    jpanel3.setBorder(BorderFactory.createEmptyBorder(5,0,5,5));

    jpanel2.add(jlabel1);
    jpanel1.add(jpanel2, BorderLayout.WEST);
    jpanel3.add(jURL);
    jpanel1.add(jpanel3, BorderLayout.CENTER);
    contentPane.add(jpanel1, BorderLayout.NORTH);

   ///////////////////////////////////////////////////
      // 捲軸

   JScrollPane jscrollpane = new JScrollPane(htmlPane,20,30);
   contentPane.add(jscrollpane,BorderLayout.CENTER);

   ///////////////////////////////////////////////////

    // Center the frame
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = this.getSize();
    if (frameSize.height > screenSize.height)
      frameSize.height = screenSize.height;
    if (frameSize.width > screenSize.width)
      frameSize.width = screenSize.width;
    this.setLocation((screenSize.width - frameSize.width)  2, (screenSize.height - frameSize.height)  2);

    this.validate();
    this.setSize(new Dimension(250, 250));
    this.setVisible(true);

      this.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent e) {
            System.exit(0);
         }
      });
  }

  // 處理超連結事件

  void showHTML(String url) {
      try {
         if (url.length() > 0) {
            if (!url.startsWith("http://") && !url.startsWith("file:/")) {
               if (url.indexOf(':') == 1) {
                  url = "file:/" + url;
               }
               else {
                  url = "http://" + url;
               }
            }
            //////////////////////////////
            URL url1 = new URL(url);
            htmlPane.setPage(url1);         //
            jURL.setText(url);
            jURL.select(0,url.length());
            /////////////////////////////

         }
      }
      catch (java.net.MalformedURLException muex) {
         JOptionPane.showMessageDialog(this, muex.toString() + ": " + url,
         "Error", JOptionPane.ERROR_MESSAGE);
      }
      catch (Exception ex){
         JOptionPane.showMessageDialog(this, ex.toString() + ": " + url,
         "Error", JOptionPane.ERROR_MESSAGE);
      }
  }
  ////////////////////////////////////////////////
  public void hyperlinkUpdate(HyperlinkEvent he){

   if(he.getEventType() == HyperlinkEvent.EventType.ACTIVATED){   //
         String s = he.getURL().toString().trim();
      showHTML(s);
   }
  }
  //////////////////////////////////////////////////
}

相關物件說明：
URL
Dimension

參考網站：
Java A+

＜Java＞ JVA306-滑鼠感應視窗

2011-03-26T15:59:00.001+08:00

import java.awt.*;
import java.awt.event.*;
class JVA306 extends Frame
           implements MouseListener, MouseMotionListener {
   String msg="", info="";
   int mouseX=0, mouseY=0 ;
   public static void main(String arg[]){
      JVA306 mew=new JVA306();
   }
   JVA306() {
      super("滑鼠感應視窗");
      addMouseListener(this);
      addMouseMotionListener(this);
      addWindowListener(new WindowAdapter(){
         public void windowClosing(WindowEvent we) {
            dispose();
         }
      });
      setBackground(Color.white);
      setSize(250,200);
      setVisible(true);
   }
   public void mouseClicked(MouseEvent me) {
   }

   public void mouseEntered(MouseEvent me) {
       //請在此撰寫滑鼠移入事件
      setBackground(Color.yellow);
      //info = "";
      repaint();
       //請在此撰寫滑鼠移入事件
   }
   public void mouseExited(MouseEvent me) {
       //請在此撰寫滑鼠移出視窗事件
      mouseX = me.getX();
      mouseY = me.getY();
      msg = "Mouse just left the window from " + mouseX +","+ mouseY;
      setBackground(Color.white);
      info = "";
      repaint();
       //請在此撰寫滑鼠移出視窗事件
   }
   public void mousePressed(MouseEvent me) {
       //請在此撰寫滑鼠按下事件
      mouseX = me.getX();
      mouseY = me.getY();
      msg = "Mouse is pressed at " + mouseX +"," +mouseY;
      info = "DOWN";
      repaint();
       //請在此撰寫滑鼠按下事件
   }
   public void mouseReleased(MouseEvent me) {
       //請在此撰寫滑鼠放開事件
      mouseX = me.getX();
      mouseY = me.getY();
      msg = "Mouse is released from " + mouseX +","+ mouseY;
      info = "UP";
      repaint();
       //請在此撰寫滑鼠放開事件
   }
   public void mouseDragged(MouseEvent me) {
       //請在此撰寫滑鼠拖曳事件
      mouseX = me.getX();
      mouseY = me.getY();
      msg = "Mouse is Dragging at " + mouseX +"," + mouseY;
      info = "Dragging...";
      repaint();
       //請在此撰寫滑鼠拖曳事件
   }
   public void mouseMoved(MouseEvent me) {
       //請在此撰寫滑鼠移動事件
      mouseX = me.getX();
      mouseY = me.getY();
      msg = "Mouse is moving to " + mouseX +","+ mouseY;
      info = "";
      repaint();
       //請在此撰寫滑鼠移動事件
   }
   public void paint(Graphics g) {
       //請在此撰寫撰寫程式取得滑鼠座標
      g.drawString(msg,10,40);
      g.drawString(info,mouseX,mouseY);
       //請在此撰寫撰寫程式取得滑鼠座標

   }
}

＜Java＞ JVA305-理想體重計算

2011-03-26T15:59:00.000+08:00

import java.awt.*;
import java.awt.event.*;
public class JVA305 extends Frame
{
  public JVA305() {   super("理想體重計算"); }
  //輸入身高的元件
  Panel pl1 = new Panel();
  Label l1 = new Label("請輸入身高");
  TextField tf1 = new TextField(2);
  //輸入體重的元件
  Panel pl2 = new Panel();
  Label l2 = new Label("請輸入體重");
  TextField tf2 = new TextField(2);
  //選擇性別的元件
  Panel pl3 = new Panel();
  Label l3 = new Label("請選擇性別");
  CheckboxGroup ckg = new CheckboxGroup();
  Checkbox ck1 = new Checkbox("男性",ckg,true);
  Checkbox ck2 = new Checkbox("女性",ckg,true);
  //顯示訊息區
  Panel pl4 = new Panel();
  Label l4 = new Label("歡迎使用",Label.CENTER);
  Label l5 = new Label(" ",Label.CENTER);
  //按鈕區
  Panel pl5 = new Panel();
  Button b1 = new Button("確定");
  Button b2 = new Button("離開");

  public static void main(String[] args)
  {
    JVA305 jv03 = new JVA305();
    jv03.go();
  }

  /*
* 建立畫面的 method
*/
  public void go()
  {

    /*
* 請自行完成建立畫面的程式碼
*/

   pl1.add(l1);
   pl1.add(tf1);

   pl2.add(l2);
   pl2.add(tf2);

   pl3.add(l3);
   pl3.add(ck1);
   pl3.add(ck2);

   pl4.add(l4);
   pl4.add(l5);

   pl5.add(b1);
   pl5.add(b2);

   Panel cp = new Panel();
   cp.setLayout(new GridLayout(6,1));
   cp.add(pl1);
   cp.add(pl2);
   cp.add(pl3);
   cp.add(l4);
   cp.add(l5);
   cp.add(pl5);

   add(cp);

    setSize(250,200);
    setVisible(true);
    addWindowListener(new WinListener());
   b1.addActionListener(new act());
   b2.addActionListener(new act());
  }

  //建立一個 ActionListener 的 inner class
  class act implements ActionListener
  {
    public void actionPerformed(ActionEvent e)
    {
        if(e.getSource() == b2)
        {
           System.exit(0);
        }
        else if(e.getSource() == b1)
        {
            float nh = 0; //現在身高
            float nw = 0; //現在體重
            float iw = 0; //理想體重

            /*
* 請自行完成建立畫面的程式碼
*/
         boolean check = true;
         try{

            nh = Float.parseFloat(tf1.getText());
            if( (nh < 110)||( nh > 210) ){
               throw new Exception();
            }
         }catch(Exception et){
            l4.setText("身高不正確，成人應介於110至210之間");
            l5.setText("");
            check = false;
         }
         try{
            nw = Float.parseFloat(tf2.getText());
            if( (nw < 25)||( nw > 200) ){
               throw new Exception();
            }
         }catch(Exception et){
            l4.setText("體重不正確，成人應介於25至200之間");
            l5.setText("");
            check = false;
         }
         if(check){
         if(   ck1.getState() ){
            iw = (nh-80)*0.7f;
            l4.setText("你的理想體重為"+ iw + "公斤");
            if( (nw-iw) > (iw*0.1f) ){
               l5.setText("你稍微胖了些，請少飲酒少應酬");
            }else if( (iw-nw) > (iw*0.1f) ){
               l5.setText("你稍微瘦了些，請多補充些營養");
            }else{
               l5.setText("你的體態控制的不錯");
            }

         }else if( ck2.getState() ){
            iw = (nh-70)*0.6f;
            l4.setText("妳的理想體重為"+ iw + "公斤");
            if( (nw-iw) > (iw*0.1f) ){
               l5.setText("妳稍微胖了些，請節制飲食多做運動");
            }else if( (iw-nw) > (iw*0.1f) ){
               l5.setText("妳稍微瘦了些，請多補充些營養");
            }else{
               l5.setText("妳的身材維持得很好");
            }

         }
         }
         }
    }
  }

  //讓視窗可以正常關閉
  class WinListener extends WindowAdapter
  {
    public void windowClosing(WindowEvent e)
    {
      e.getWindow().dispose();
      System.exit(0);
    }
  }

}

＜Java＞ JVA304-簡易繪圖板

2011-03-26T15:48:00.002+08:00

/*
設計一個簡易繪圖板，畫布大小為400*200，並設定背景顏色為藍色
拖曳滑鼠時，產生繪圖效果，並顯示滑鼠座標
若按下"c"鍵，則設定畫筆為藍色，若按下其餘的按鍵，則設定畫筆為紅色
*/

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

public class JVA304 extends JFrame
  {
  int x, y, kcode;
  private JLabel label;

  public JVA304()
    {
    super("簡易繪圖板");
    Container c = getContentPane();
    c.setLayout(new FlowLayout());
    label = new JLabel();
   c.add(label);
    addWindowListener(new MyListener());

/*
請在此處加上程式碼，您必須
1、啟動物件來處理滑鼠及按鍵事件
2、設定背景顏色
3、設定JFrame大小並顯示
*/
   addMouseMotionListener(new MouseMotion());
   addKeyListener(new KEvent());
   setBackground(Color.blue);
   setSize(400,200);
   setVisible(true);
    }

//處理程式關閉
  class MyListener extends WindowAdapter
  {
    public void windowClosing(WindowEvent e)
      {
        System.exit(1);
      }
  }

//滑鼠拖曳事件處理程式
  class MouseMotion extends MouseMotionAdapter
  {
/*
請在此處加上程式碼，您必須
1、顯示滑鼠座標
2、處理繪圖
*/
      public void mouseMoved(MouseEvent e){
         x = e.getX();
         y = e.getY();
         label.setText("滑鼠座標：(" + x + "," + y + ")" );
      }
      public void mouseDragged(MouseEvent e){
         x = e.getX();
         y = e.getY();
         label.setText("滑鼠拖曳座標：(" + x + "," + y + ")" );
         repaint();
      }

    }

//取得按鍵的字元
  class KEvent extends KeyAdapter
  {
/*
請在此處加上程式碼，您必須
1、取得按鍵值
*/
   public void keyPressed(KeyEvent ke){
      kcode = ke.getKeyCode();
   }

  }

//判斷按鍵是否為"c"，若是則色筆為藍色，若否，則色筆為紅色，並繪製
  public void paint(Graphics g)
    {
/*
請在此處加上程式碼，您必須
1、判斷按鍵，並設定畫筆顏色
2、繪圖
*/
      if(kcode == 67){
         g.setColor(Color.blue);
         g.fillOval(x,y,20,20);
      }else{
         g.setColor(Color.red);
         g.fillOval(x,y,5,5);
      }
   label.repaint();

    }

  public static void main(String args[])
    {
   new JVA304();
    }
  }

相關物件說明：
Graphics

參考網站：
Java A+

＜Java＞ JVA303-門診掛號系統

2011-03-26T15:48:00.000+08:00

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JVA303 extends JFrame implements ItemListener
{
  //pnMain 包含了 pnMainA ,pnMainB
  JPanel      pnMain   = new JPanel();

  //pnMainA 包含了 pn1,pn2
  JPanel      pnMainA   = new JPanel();

  //pn1 包含了 name, chSex
  JPanel      pn1       = new JPanel();
  JTextField  name      = new JTextField(5); //姓名
  String sex[] = {"先生","小姐"};
  JComboBox   chSex     = new JComboBox(sex);//性別

  //pn2 包含了 chDep, chDr
  JPanel      pn2       = new JPanel();
  String Dep[] = {"內科","外科","婦產科"};
  JComboBox   chDep     = new JComboBox(Dep);   //科別
  String Dr[] = {"令狐沖","任盈盈"};
  JComboBox   chDr      = new JComboBox(Dr);   //醫師

  //pn3 包含了 chWeekDay
  JPanel      pn3       = new JPanel();
  String WeekDay[] = {"星期一早上","星期二晚上","星期三晚上","星期四下午","星期五晚上"};
  JComboBox   chWeekDay = new JComboBox(WeekDay);   //門診時段

  //pnMainB 包含了ta
  JPanel      pnMainB   = new JPanel();
  JTextArea   ta        = new JTextArea("尚未完成掛號", 4, 20);

  //pnButton 包含了b1, b2
  JPanel      pnButton  = new JPanel();
  JButton     b1        = new JButton("確定");
  JButton     b2        = new JButton("離開");

  public JVA303()
  {
    super("門診掛號系統");
    addWindowListener(new WinListener());
  }

  public static void main(String[] args)
  {
    JVA303 test = new JVA303();
    test.setup();
    test.setSize(250,270);
    test.setVisible(true);
  }

  //建立畫面
  void setup()
  {
    //將視覺元件放入 JPanel 中
    chDep.addItemListener(this);
    chDr.addItemListener(this);
    pn1.add(new JLabel("姓名:"));
    pn1.add(name);
    pn1.add(new JLabel("性別:"));
    pn1.add(chSex);
   pn2.add(new JLabel("科別:"));
    pn2.add(chDep);
    pn2.add(new JLabel("醫師:"));
    pn2.add(chDr);
    pn3.add(new JLabel("門診時段:"));
   pn3.add(chWeekDay);

    pnMainA.setLayout(new GridLayout(0,1));
    pnMainA.add(pn1);
    pnMainA.add(pn2);
    pnMainA.add(pn3);
    pnMainB.add(ta);
    pnMain.add(pnMainA);
    pnMain.add(pnMainB);

    b1.addActionListener(new act());
    b2.addActionListener(new act());
    pnButton.add(b1);
    pnButton.add(b2);
    Container contentPane = getContentPane();
    contentPane.add(pnMain);
    contentPane.add(pnButton,BorderLayout.SOUTH);
  }

  //依第一個下拉式選單的選項動態更改第二個下拉式選單的中的內容
  public void itemStateChanged(ItemEvent e)
  {

    /*
* 請同學將這一部份的程式碼撰寫出來
* (1)科別有更動時醫師的下拉式選單中的內容也要隨著動態更動。
* (2)醫師有更動時門診時段的下拉式選單中的內容也要隨著動態更動。
*/

    if(e.getSource() == chDep){
      String s = (String)e.getItem();
      chDr.removeAllItems();

      if(s.equals("內科")){
         chDr.addItem("令狐沖");
         chDr.addItem("任盈盈");
      }else if(s.equals("外科")){
         chDr.addItem("楊過");
         chDr.addItem("小龍女");
      }else if(s.equals("婦產科")){
         chDr.addItem("郭靖");
         chDr.addItem("黃蓉");
      }

    }
    else if(e.getSource() == chDr){
      String s = (String)e.getItem();
      chWeekDay.removeAllItems();
      if( s.equals("令狐沖")){
         String weekDay[]={"星期一早上","星期二晚上","星期三晚上","星期四下午","星期五晚上"};
         for(int i=0 ; i<weekDay.length ; i++ )       chWeekDay.addItem(weekDay[i]);
      }else if( s.equals("任盈盈")){
         String weekDay[]={"星期一下午","星期二早上","星期三下午","星期四早上","星期五下午"};
         for(int i=0 ; i<weekDay.length ; i++ )       chWeekDay.addItem(weekDay[i]);
      }else if( s.equals("楊過")){
         String weekDay[]={"星期一晚上","星期二晚上","星期三早上","星期四下午","星期五晚上"};
         for(int i=0 ; i<weekDay.length ; i++ )       chWeekDay.addItem(weekDay[i]);
      }else if( s.equals("小龍女")){
         String weekDay[]={"星期一下午","星期二早上","星期三晚上","星期四早上","星期五下午"};
         for(int i=0 ; i<weekDay.length ; i++ )       chWeekDay.addItem(weekDay[i]);
      }else if( s.equals("郭靖")){
         String weekDay[]={"星期一晚上","星期二下午","星期三晚上","星期四下午","星期五晚上"};
         for(int i=0 ; i<weekDay.length ; i++ )       chWeekDay.addItem(weekDay[i]);
      }else if( s.equals("黃蓉")){
         String weekDay[]={"星期一下午","星期二早上","星期三早上","星期四早上","星期五早上"};
         for(int i=0 ; i<weekDay.length ; i++ )       chWeekDay.addItem(weekDay[i]);
      }
   }
  }

  //建立一個 ActionListener 的 inner class
  class act implements ActionListener
  {
    public void actionPerformed(ActionEvent e)
    {
        if(e.getSource() == b2)
        {
           System.exit(0);
        }
        else if(e.getSource() == b1)
        {
           /*
* 請同學將這一部份的程式碼撰寫出來
* 讓程式可以顯示下列內容:
*
* ***先生您好
* 您掛的門診為：內科
* 門診時段為：星期一早上
* 為您看診的是：令狐沖醫師
*
*/
         ta.setText(   name.getText() + (String)chSex.getSelectedItem() + "您好\n" +
                  "您掛的門診為：" + (String)chDep.getSelectedItem() +"\n" +
                  "門診時段為：" + (String)chWeekDay.getSelectedItem() + "\n" +
                  "為您看診的是："+ (String)chDr.getSelectedItem() + "醫師\n"
                  );
         System.gc();
        }
    }
  }

  //讓視窗能夠正常關閉
  class WinListener extends WindowAdapter
  {
    public void windowClosing(WindowEvent e)
    {
      e.getWindow().dispose();
      System.exit(0);
    }
  }
}

＜Java＞ JVA302-字體設定選擇器

2011-03-26T15:42:00.001+08:00

/*
設定文字屬性，
1、建立選項鈕設定不同的對齊方式，但只能選取其中一種對齊方式。
2、建立核取方塊設定「粗體」或「斜體」。
3、建立下立選項設定字體大小

*/

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class JVA302 extends JFrame implements ItemListener

  {
  JTextField tf;
  JCheckBox boldBox, italicBox;
  int bold=Font.PLAIN, italic=Font.PLAIN;
  int align=JTextField.LEFT, fonts=14;

  private JRadioButton leftRadio, centerRadio, rightRadio;
  private ButtonGroup buttonGroup;

   //下拉選項
  private String name[] = {"14", "16", "18", "20"};
  private JComboBox comboBox = new JComboBox(name);

  public JVA302()
    {
    super("字體設定選擇器");
    Container c = getContentPane();
    c.setLayout(new FlowLayout());
    tf=new JTextField("Just a font Tester", 20);
    tf.setFont(new Font("Serif",Font.PLAIN,14));

   //選項鈕
/*
請在此處加上程式碼，您必須
1、設定核取方塊
*/
   buttonGroup = new ButtonGroup();
   leftRadio = new JRadioButton("靠左對齊",true);
   centerRadio = new JRadioButton("置中對齊");
   rightRadio = new JRadioButton("靠右對齊");
   buttonGroup.add(leftRadio);
   buttonGroup.add(centerRadio);
   buttonGroup.add(rightRadio);

   //核取方塊
/*
請在此處加上程式碼，您必須
1、設定核取方塊
*/
   boldBox = new JCheckBox("粗體");
   italicBox = new JCheckBox("斜體");

   //設定Listener
    addWindowListener(new MyListener());

    boldBox.addItemListener(this);
    italicBox.addItemListener(this);

    leftRadio.addItemListener(this);
    centerRadio.addItemListener(this);
    rightRadio.addItemListener(this);

    comboBox.setMaximumRowCount(3);
    comboBox.addItemListener(this);

   //加入介面
/*
請在此處加上程式碼，您必須
1、顯示文字欄位
2、顯示選項鈕
3、顯示核取方塊
4、顯示下拉選單
*/
   JPanel jpRadio = new JPanel();
   jpRadio.setLayout(new FlowLayout(FlowLayout.CENTER));
   JPanel jpCheck = new JPanel();
   jpCheck.setLayout(new FlowLayout(FlowLayout.CENTER));

   c.add(tf);
   jpRadio.add(leftRadio);
   jpRadio.add(centerRadio);
   jpRadio.add(rightRadio);
   jpCheck.add(boldBox);
   jpCheck.add(italicBox);
   jpCheck.add(comboBox);

   c.add(jpRadio);
   c.add(jpCheck);
   //設定大小，顯示JFrame
    setSize(280, 150);
    setVisible(true);
    }

   //處理程式關閉
  class MyListener extends WindowAdapter
  {
    public void windowClosing(WindowEvent e)
      {
        System.exit(1);
      }
  }

  public void itemStateChanged(ItemEvent e)
    {
   /*
請在此處加上程式碼，您必須
1、設定粗體、斜體處理程式
2、設定對齊處理程式
3、設定字體大小處理程式
4、依不同的設定值顯示文字
*/

      if(e.getSource()==leftRadio){
         align = JTextField.LEFT;
      }else if(e.getSource() == centerRadio){
         align = JTextField.CENTER;
      }else if(e.getSource() == rightRadio){
         align = JTextField.RIGHT;
      }

      if(e.getSource() == boldBox){
         if(e.getStateChange() == ItemEvent.SELECTED){
            bold = Font.BOLD;
         }else if(e.getStateChange() == ItemEvent.DESELECTED){
            bold = Font.PLAIN;
         }
      }else if(e.getSource() == italicBox){
         if(e.getStateChange() == ItemEvent.SELECTED){
            italic = Font.ITALIC;
         }else if(e.getStateChange() == ItemEvent.DESELECTED){
            italic = Font.PLAIN;
         }
      }

      if(e.getSource() == comboBox){
         fonts = Integer.parseInt((String)comboBox.getSelectedItem());
      }
      tf.setHorizontalAlignment(align);
      tf.setFont(new Font("Serif", (bold + italic) , fonts));
    }
  public static void main( String args[] )
    {
      new JVA302();
    }
  }

相關函式：
Font(String name, int style , int size)

參考網站：
Java A+

＜Java＞ JVA301-各國貨幣轉換

2011-03-26T15:40:00.001+08:00

import java.awt.* ;
import java.awt.event.* ;

public class JVA301 implements TextListener
{
    TextField input = new TextField("") ;
   TextField usd = new TextField("") ;  // 美金現值
   TextField jpy = new TextField("") ;  // 日圓現值
   TextField hkd = new TextField("") ;  // 港幣現值
    TextField gbp = new TextField("") ;  // 英鎊現值
    TextField eur = new TextField("") ;  // 歐元現值

   public static void main(String args[])
   {
              //請在此撰寫程式碼
      JVA301 jva = new JVA301();
      jva.start();
              //請在此撰寫程式碼
      }
   public void start()
   {
      Frame f = new Frame("各國貨幣換算") ;
      f.addWindowListener(new WindowAdapter(){
         public void windowClosing(WindowEvent e)
         {
            System.exit(0);
         }
      });
      f.setSize(400,300);

      //註冊事件處理函式
      input.addTextListener(this) ;

                //請在此撰寫程式碼
      Panel p = new Panel();
      p.setLayout(new GridLayout(5,2));
      p.add(new Label("美金現值"));
      p.add(usd);
      p.add(new Label("日幣現值"));
      p.add(jpy);
      p.add(new Label("港幣現值"));
      p.add(hkd);
      p.add(new Label("英鎊現值"));
      p.add(gbp);
      p.add(new Label("日幣現值"));
      p.add(eur);

      f.add(input,"South");
      f.add(p,"North");

      f.setVisible(true);
                //請在此撰寫程式碼
   }

   public void textValueChanged(TextEvent e)
   {
      String origin = input.getText() ;
      int originvalue   = 0 ;
      try
      {
                      //請在此撰寫程式碼
         originvalue = Integer.parseInt(origin);
         usd.setText(""+originvalue*0.029);
         jpy.setText(""+originvalue*33.53);
         hkd.setText(""+originvalue*0.22);
         gbp.setText(""+originvalue*0.018);
         eur.setText(""+originvalue*0.03);
                      //請在此撰寫程式碼
      }catch(Exception exc)
      {
                     //請在此撰寫程式碼
         usd.setText("請勿輸入非數字的字元");
         jpy.setText("請勿輸入非數字的字元");
         hkd.setText("請勿輸入非數字的字元");
         gbp.setText("請勿輸入非數字的字元");
         eur.setText("請勿輸入非數字的字元");
                     //請在此撰寫程式碼
      }

   }
}

Stable Marriage Problem - 聯招

2011-03-26T14:17:00.001+08:00

SMP問題也可以用來解決大學聯招問題

運用學生考試分數與志願排名來進行配對

這個方法算是簡易的配對方法
如果學校有設定科目加權、要求分數需於均標、高標等
則需改寫配對方法

配對方法：

尋找學生第一志願

學校是否額滿

是，配對

改變最低錄取分

檢查額滿狀態

否，找尋學校中最低錄取分數比較

分數較高取代

重新計算最低錄取分

並為被取代的重新尋找配對

分數較低找下一志願

==============================================

配對部分程式碼(Java)

   public void match(){
      int i;
      for( i=0 ; i <= schAmt ; i++ ){      //清空額滿狀態
         schFull[i]=false;
      }
      for( i=1; i <= stdAmt ; i++){      //為每位學生配對
         stableByGrade(i);
      }

   }

   private void stableByGrade(int std){
      int pstd,psch,i;
      boolean s;
      s = false;
      i=1;
      while(!s){
         psch = student.getWsr(std,i);         //尋找std 志願
         if (schFull[psch]==false){   //學校未額滿直接配對
            stdSch[std] = psch;
            schStdAmt[psch]++;
            school.setEnrollList(psch,schStdAmt[psch], std);

            //若比最低錄取分低改變最低分數登記為最低分數學生
            if(school.getLastGrade(psch) > student.getGrade(std)){
               school.setLastGrade(psch,student.getGrade(std));
               schStdLast[psch]=std;
               schStdLastSeat[psch]=schStdAmt[psch];
            }
            //如果總數已達到錄取名額改變為錄取額滿
            if(schStdAmt[psch] >= school.getEnrollLimit(psch)){
               schFull[psch] = true;
            }
            s = true;         //配對成功
         }
         else{               //學校錄取額滿先比較
            //讀取最低分數比較分數
            //分數較高取代並為學生重新配對
            if(school.getLastGrade(psch) < student.getGrade(std))
            {
               pstd = schStdLast[psch];
               stdSch[std] = psch;
               school.setEnrollList(psch,schStdLastSeat[psch],std);
               //重新尋找最低分數
                  int scSeat, lscLim, lgrd, lstd;
                  lscLim = school.getEnrollLimit(psch);
                  lstd = 0;
                  lgrd = 100;
                  for(scSeat = 1; scSeat <= lscLim ; scSeat++ )
                  {
                     lstd = school.getEnrollList(psch,scSeat);
                     if(lgrd > student.getGrade(lstd)){
                        lgrd = student.getGrade(lstd);
                        schStdLast[psch]=lstd;
                        schStdLastSeat[psch]=scSeat;
                     }
                  }
                  school.setLastGrade(psch,lgrd);
               s=true;         //配對成功

               stableByGrade(pstd);   //pstd重新配對
            }
            else{
               i++;         //找下一個志願
            }
         }
      }
   }

Stable Marriage Problem

2011-03-26T14:07:00.000+08:00

Stable Marriage Problem (SMP)
穩定婚姻配對

這個問題主要是處理男性與女性間的婚姻配對
運用每個男性心目中對每個女性的排名
以及每個女性心目中對每個男性的排名

使每一對夫婦對彼此伴侶的排名不會產生
(M,W)與(m,w)中
M男對w女的排名高於現任妻子W
且w女對M男的排名高於現任丈夫m男

我參考這個網頁

Math Site: Stable Marriage Problem

玩一玩配對遊戲推測出來的配對方法

配對方法：

尋找男性排名最高的女性

女性是否單身

是，配對

否，找尋女性現在的配對男性在女性心目中排名比較

排名較大取代並為被取代的重新尋找配對

排名較小找下一位

                (女性優先則男女互換)

＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

配對部分的程式碼(Java)

   public void match(int mw){
      int i;
      for( i=1 ; i <= n ; i++ ){      //清空單身狀態
         single[i]=true;
      }
      if(mw == 1){
         for( i = 1; i <= n ; i++){
            stableByMan(i);
         }
      }
      else{
         for( i = 1; i <= n ; i++){
            stableByWoman(i);
         }
      }
   }

private void stableByMan(int man){
      int pm,pw,i;
      boolean s;
      s = false;
      i=1;
      while(!s){
         pw = wmrA.getWmr(man,i); //wmr 為在男性心目中對女性的排名
         if (single[pw]==true){   //單身直接配對
            x[man] = pw;
            y[pw] = man;
            single[pw] = false;
            s = true;         //配對成功
         }
         else{               //有伴先比較
            pm = y[pw];         //讀取已配好的伴
            if(mwrA.getRwm(pw,man) < mwrA.getRwm(pw,pm)){   //現在的與之前的相比
               x[man] = pw;
               y[pw] = man;
               s=true;         //配對成功
               stableByMan(pm);   //pm重新配對
            }
            else{
               i++;         //找下一位
            }
         }
      }
   }

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Windows XP 無線網路WZC (Wireless Zero Configuration)服務啟動

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＜Java＞ JVA410-成績計算

＜Java＞ JVA409-撲克牌發牌程式

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＜Java＞ JVA407-五彩拼盤

＜Java＞ JVA406-檔案讀取器

＜Java＞ JVA405-資料庫瀏覽器

＜Java＞ JVA404-簡易記事本

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＜Java＞ JVA402-文字檔合併器

＜Java＞ JVA401-英文一點通

＜Java＞ JVA310-年齡計算

＜Java＞ JVA309-多彩圖形繪板

＜Java＞ JVA308-藝人音樂評等

＜Java＞ JVA307-簡易瀏覽器

＜Java＞ JVA306-滑鼠感應視窗

＜Java＞ JVA305-理想體重計算

＜Java＞ JVA304-簡易繪圖板

＜Java＞ JVA303-門診掛號系統

＜Java＞ JVA302-字體設定選擇器

＜Java＞ JVA301-各國貨幣轉換

Stable Marriage Problem - 聯招

Stable Marriage Problem

＜VB＞檢視網頁原始碼