oop-praddy

using jstl sql with a connection pool

2011-02-21T19:20:00.001+05:30

view the post at:- http://groups.google.com/group/oop_programming/browse_thread/thread/62099c680f049077?hl=en

with a jndi name of jdbc_void in the container

and the following text in web.xml file

MySQL Database Connection

jdbc_void

javax.sql.DataSource

Container

Shareable

and the following text in jsp file:

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql"%>

call sp_sel_user_shouts(?,?);

${myID}

${vis}

${row.columnName}

download the latest jstl jar file from http://tomcat.apache.org/taglibs/standard/

Pradyut
http://pradyut.tk
http://oop-edge.blogspot.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/
http://oop-edge.spaces.live.com/
http://www.flickr.com/photos/praddy
http://groups.google.com/group/oop_programming
India

Sub domains in glassfish

2010-03-19T04:26:00.004+05:30

Sub domains in glassfish

Pradyut
http://pradyut.tk
India

Automatically update comments records with animation using jquery

2010-01-29T02:41:00.003+05:30

This shows how to automatically update new comments or records with
animation effects

but no deleted ones will be updated...only new ones...

Documentation coming soon....

the url here

also if you want to update here but its live here...link

and updates will be done at the former link.

the newdata.jsp page returns this...link (only a sample)

Any comments welcome...

thanks

--
Pradyut
http://pradyut.tk
http://oop-edge.blogspot.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/
http://oop-edge.spaces.live.com/
http://www.flickr.com/photos/praddy
http://groups.google.com/group/oop_programming
India

Java Collections Interview Questions

2010-01-12T23:20:00.000+05:30

What is the Collections API?

The Collections API is a set of classes and interfaces that support operations on collections of objects.
Example of classes: HashSet, HashMap, ArrayList, LinkedList, TreeSet and TreeMap.
Example of interfaces: Collection, Set, List and Map.

What is the List interface?

The List interface provides support for ordered collections of objects.

How can we access elements of a collection?

We can access the elements of a collection using the following ways:
1.Every collection object has get(index) method to get the element of the object. This method will return Object.
2.Collection provide Enumeration or Iterator object so that we can get the objects of a collection one by one.

What is the Set interface?

The Set interface provides methods for accessing the elements of a finite mathematical set. Sets do not allow duplicate elements.

What’s the difference between a queue and a stack?

Stack is a data structure that is based on last-in-first-out rule (LIFO), while queues are based on First-in-first-out (FIFO) rule.

What is the Map interface?

The Map interface is used associate keys with values.

What is the Properties class?

The properties class is a subclass of Hashtable that can be read from or written to a stream. It also provides the capability to specify a set of default values to be used.

Which implementation of the List interface provides for the fastest insertion of a new element into the middle of the list?

a. Vector
b. ArrayList
c. LinkedList
d. None of the above

ArrayList and Vector both use an array to store the elements of the list. When an element is inserted into the middle of the list the elements that follow the insertion point must be shifted to make room for the new element. The LinkedList is implemented using a doubly linked list; an insertion requires only the updating of the links at the point of insertion. Therefore, the LinkedList allows for fast insertions and deletions.

How can we use hashset in collection interface?

This class implements the set interface, backed by a hash table (actually a HashMap instance). It makes no guarantees as to the iteration order of the set; in particular, it does not guarantee that the order will remain constant over time. This class permits the Null element.

This class offers constant time performance for the basic operations (add, remove, contains and size), assuming the hash function disperses the elements properly among the buckets.

What are differences between Enumeration, ArrayList, Hashtable and Collections and Collection?

Enumeration: It is series of elements. It can be use to enumerate through the elements of a vector, keys or values of a hashtable. You can not remove elements from Enumeration.

ArrayList: It is re-sizable array implementation. Belongs to 'List' group in collection. It permits all elements, including null. It is not thread -safe.

Hashtable: It maps key to value. You can use non-null value for key or value. It is part of group Map in collection.

Collections: It implements Polymorphic algorithms which operate on collections.

Collection: It is the root interface in the collection hierarchy.

What is difference between array & arraylist?

An ArrayList is resizable, where as, an array is not. ArrayList is a part of the Collection Framework. We can store any type of objects, and we can deal with only objects. It is growable. Array is collection of similar data items. We can have array of primitives or objects. It is of fixed size. We can have multi dimensional arrays.

Array: can store primitive ArrayList: Stores object only

Array: fix size ArrayList: resizable

Array: can have multi dimensional

Array: lang ArrayList: Collection framework

Can you limit the initial capacity of vector in java?

Yes you can limit the initial capacity. We can construct an empty vector with specified initial capacity

public vector(int initialcapacity)

What method should the key class of Hashmap override?

The methods to override are equals() and hashCode().

What is the difference between Enumeration and Iterator?

The functionality of Enumeration interface is duplicated by the Iterator interface. Iterator has a remove() method while Enumeration doesn't. Enumeration acts as Read-only interface, because it has the methods only to traverse and fetch the objects, where as using Iterator we can manipulate the objects also like adding and removing the objects.

So Enumeration is used when ever we want to make Collection objects as Read-only.

What is HashMap and Map?

Map is Interface and Hashmap is class that implements this interface.

What is the significance of ListIterator?

Or

What is the difference b/w Iterator and ListIterator?

Iterator : Enables you to cycle through a collection in the forward direction only, for obtaining or removing elements

ListIterator : It extends Iterator, allow bidirectional traversal of list and the modification of elements

Difference between HashMap and HashTable? Can we make hashmap synchronized?

1. The HashMap class is roughly equivalent to Hashtable, except that it is unsynchronized and permits nulls. (HashMap allows null values as key and value whereas Hashtable doesn’t allow nulls).
2. HashMap does not guarantee that the order of the map will remain constant over time.
3. HashMap is non synchronized whereas Hashtable is synchronized.
4. Iterator in the HashMap is fail-safe while the enumerator for the Hashtable isn't.

Note on Some Important Terms
1)Synchronized means only one thread can modify a hash table at one point of time. Basically, it means that any thread before performing an update on a hashtable will have to acquire a lock on the object while others will wait for lock to be released.

2)Fail-safe is relevant from the context of iterators. If an iterator has been created on a collection object and some other thread tries to modify the collection object "structurally”, a concurrent modification exception will be thrown. It is possible for other threads though to invoke "set" method since it doesn’t modify the collection "structurally”. However, if prior to calling "set", the collection has been modified structurally, "IllegalArgumentException" will be thrown.

HashMap can be synchronized by

Map m = Collections.synchronizeMap(hashMap);

What is the difference between set and list?

A Set stores elements in an unordered way and does not contain duplicate elements, whereas a list stores elements in an ordered way but may contain duplicate elements.

Difference between Vector and ArrayList? What is the Vector class?

Vector is synchronized whereas ArrayList is not. The Vector class provides the capability to implement a growable array of objects. ArrayList and Vector class both implement the List interface. Both classes are implemented using dynamically resizable arrays, providing fast random access and fast traversal. In vector the data is retrieved using the elementAt() method while in ArrayList, it is done using the get() method. ArrayList has no default size while vector has a default size of 10. when you want programs to run in multithreading environment then use concept of vector because it is synchronized. But ArrayList is not synchronized so, avoid use of it in a multithreading environment.

What is an Iterator interface? Is Iterator a Class or Interface? What is its use?

The Iterator is an interface, used to traverse through the elements of a Collection. It is not advisable to modify the collection itself while traversing an Iterator.

sending smtp mail(gmail) using java mail (glassfish)

2009-03-12T00:49:00.009+05:30

the post at: -

http://groups.google.com/group/oop_programming/browse_thread/thread/f2df17c480e45369

thanks....

Pradyut
http://pradyut.tk
http://oop-edge.blogspot.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/
http://oop-edge.spaces.live.com/
http://www.flickr.com/photos/praddy
http://groups.google.com/group/oop_programming
India

java resultset using mysql stored procedure

2008-11-29T20:42:00.004+05:30

Obtaining a java sql resultset using mysql stored procedure is quite a headache....

any better implementation is always a welcome....

I have used "MySQL Connector/J" jdbc driver available here

I have used java.sql.CallableStatement in the java class.

The Table in mysql is: -
-----------------------------------------------------------------------
DROP TABLE IF EXISTS `test_post`;
CREATE TABLE `test_post` (
`Post_Id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`Subject` varchar(50) NOT NULL,
`Post_msg` text NOT NULL,
PRIMARY KEY (`Post_Id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;
-----------------------------------------------------------------------

The stored procedure is: -
-----------------------------------------------------------------------
CREATE DEFINER=`root`@`localhost` PROCEDURE `sp_select_test_post`(in id integer)
BEGIN
SELECT * FROM test_post where post_id=id;
END
-----------------------------------------------------------------------

The java code: -
-----------------------------------------------------------------------
public class Main {

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
//System.out.print();
try
{
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/void?" + "user=myUsername&password=myPassword");
CallableStatement stmt = conn.prepareCall(" call sp_select_test_post(?) ");
stmt.setInt(1, 2);
stmt.execute();
ResultSet rs = stmt.getResultSet();
/*ResultSetMetaData rmeta = rs.getMetaData();
System.out.print(rmeta.getColumnCount());*/
while(rs.next()) {
System.out.print(rs.getString(2) + "\n");
}
System.out.print("connected");
conn.close();
}
catch (ClassNotFoundException cnfe) {
System.out.print(cnfe);
}
catch(InstantiationException ie) {
System.out.print(ie);
}
catch(IllegalAccessException iae) {
System.out.print(iae);
}
catch(SQLException sqle) {
System.out.print(sqle);
}
}
}
-----------------------------------------------------------------------

Hope that runs in your systems too... Good Luck..
Please post any better implementation ... thanks...
Cheers!!!

Pradyut Kumar Bhattacharya
http://pradyut.tk
http://oop-edge.spaces.msn.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/

New Delhi, India

Re: java code to evaluate a arithmetic expression....

2008-06-28T02:59:00.001+05:30

The code better implemented: -
Please review and suggest a better implementation.
    Any comments are welcome.
    Download the code at: -
        http://myjavaserver.com/~pradyut/files/Calci.java
     The code: -
---------------------------------------------------------------------------------------------------------------------------------------------------------------------

public class Calci {


    public static void main(String[] args) {

        String a = "4-(6-1)+3*9/2(8(6-1))(7-43)4-(6-1)+3.67*9/2(8(6.77+1))(7-4.3)"; //1*3+2*7-1-1
        //(2+1)-(4-2)3/(-5)
        //3*(1-2)
        //4-(6-1)+3*9/2(8(6-1))(7-43)
        //14-(4/(6-9))

        String[] b = null;
        String c = null;

        Calci obj = new Calci();

        System.out.println(obj.parse(a));

    }
    double func(String a) {
        double d = 0;

        return d;
    }
    String mult(String a, String b) {
        double c = func1(a) * func1(b);
        return (Double.toString(c));
    }
    String minus(String a, String b) {

        double c = func1(a) - func1(b);
        System.out.println(c);
        return (Double.toString(c));
    }
    String add(String a, String b) {
        double c = func1(a) + func1(b);
        return (Double.toString(c));
    }

    String divide(String a, String b) {
        double c = func1(a) / func1(b);
        return (Double.toString(c));
    }

    double func1(String a) {
        double d =0;
        try {
            d = Double.parseDouble(a);
        } catch (NumberFormatException n1) {
            System.out.println(n1);
        }
        return d;
    }


    String parse(String a) {
        String b = null;
        String c = null, d= null, e=null;
        int z=0, f=0;
        if(a.contains("(")) {


            //System.out.println(b[0]);

            z = a.lastIndexOf("(");
            f = a.indexOf(")", z)+1;
            c = a.substring(z, f);

            b =a.substring(0, z);
            d = a.substring(f, a.length());

            //processing b
            if(b.length() >=1) {
                e = String.valueOf(b.charAt(b.length()-1));
                if(e.equals("+") || e.equals("-") || e.equals("*") || e.equals("/") || e.equals("(")) {

                }else
                {
                    b = b+ "*";
                }
                //System.out.println("b is: " + b);
            }
            //processing d
            if(d.length() >1) {
                e = String.valueOf(d.charAt(0));
                if(e.equals("+") || e.equals("-") || e.equals("*") || e.equals("/") || e.equals(")")) {

                }else
                {
                    d = "*" + d;
                }
                //System.out.println("d is: "+d);
            }
                c = check(brackets(c));
                //System.out.println("c is: "+c);
                //c = "5";

            a = b + c + d;
                if(a.contains("*-")) {
                    //System.out.println("inside a is: "+a);
                    z = a.indexOf("*-");
                    b = a.substring(0, z);
                    //System.out.println("inside b is: "+b);
                    a = a.substring(z, a.length());
                    b = repl(b);

                    //System.out.println("inside a is: "+a);
                    a= a.replace("*-", "*");

                    a = b+a;
                } else if (a.contains("--")) {
                    a= a.replace("--", "+");
                } else if (a.contains("+-")) {
                    a= a.replace("+-", "-");
                } else if (a.contains("/-")) {
                    z = a.indexOf("/-");
                    b = a.substring(0, z);
                    //System.out.println("inside b is: "+b);
                    a = a.substring(z, a.length());
                    /*if( b.lastIndexOf('+') > b.lastIndexOf('-'))
                        b=b.replace(b.charAt(b.lastIndexOf('+')), '-');
                    else
                        b=b.replace(b.charAt(b.lastIndexOf('-')), '+');
                    */
                    b=repl(b);
                    //System.out.println("inside a is: "+a);
                    a= a.replace("/-", "/");

                    a = b+a;
                }
            System.out.println("a is: "+a);
                return parse(a);

            //System.out.println(a.substring(a.lastIndexOf("(")+1, a.indexOf(")", z)));
        }
        else
            return check(a);
    }

    String repl(String b) {
        int j,k,l;
        String h;
        if(b.length() >1)
        {
                if(b.contains("+") || b.contains("-")) {
                    j = b.lastIndexOf('+');
                    k = b.lastIndexOf('-');
                    l = b.lastIndexOf(')');
                    if (l<j || l<k) {
                        if( b.lastIndexOf('+') > b.lastIndexOf('-'))
                        {
                            System.out.println("inside");

                            b=b.replace(b.charAt(b.lastIndexOf('+')), '-');
                            return b;
                        }
                        else
                        {
                            //System.out.println("test B");
                            System.out.println("inside 1");
                            b=b.replace(b.charAt(b.lastIndexOf('-')), '+');
                            return b;
                        }
                    } else {
                        System.out.println("inside 2");
                        h = b.substring(0, b.lastIndexOf('('));
                        System.out.println("h is: "+h);
                        b = b.substring(b.lastIndexOf('('), b.length());
                        System.out.println("b is: "+b);
                        if( h.lastIndexOf('+') > h.lastIndexOf('-'))
                        {
                            //System.out.println("test A");
                            h=h.replace(h.charAt(h.lastIndexOf('+')), '-');
                            b = h+b;
                            return b;
                        }
                        else
                        {
                            //System.out.println("test B");
                            h=h.replace(h.charAt(h.lastIndexOf('-')), '+');
                            b = h+ b;
                            return b;
                        }
                    }
                }
                else
                {
                    b = "-" + b;
                    return b;
                }
            } else
            {
                b = "-" + b;
                return b;
            }
    }



    String brackets(String b) {
        b = b.replace("(", "");
        b = b.replace(")", "");
        return b;
    }

    String check(String a) {
        String[] b=null;

        if(a.indexOf('+')==0) {
            a=a.substring(1);
            check(a);
        }
        if(a.contains("+")) {
            //System.out.println("This is inside minus");


            /*if(a.indexOf('+') ==0) {
                a=a.substring(1);
            }*/
            b = a.split("\\+",2);

            a=add(check1(b[0]),check(b[1])) ;
            return a;
        }
        else
            return check1(a);
    }

    private String check1(String a) {

        String[] b=null;

        if(a.contains("-")) {


            if(a.indexOf('-')==0)
            {
                a =a.substring(1);
                if(a.contains("-")) {
                    b = a.split("-", 2);
                    b[0] = "-" + b[0];
                    b[1] = "-" + b[1];
                    a = add(check2(b[0]), check1(b[1]));
                }
                else {
                    //System.out.println("this is here");
                    a = "-"+a;
                    a = check2(a);
                }
            } else {
                b = a.split("-", 2);
                //b[0] = "-" + b[0];

                b[1] = "-" + b[1];
                a = add(check2(b[0]), check1(b[1]));
            }
            return a;
        }else
            return check2(a);
        //throw new UnsupportedOperationException("Not yet implemented");

    }

    private String check2(String a) {
        String[] b=null;
        if(a.contains("*")) {
            b = a.split("\\*",2);
            a = mult(check3(b[0]), check2(b[1])) ;
            return a;
        }

        else
            return check3(a);
        //throw new UnsupportedOperationException("Not yet implemented");
    }

    private String check3(String a) {
        String[] b=null;
        if(a.contains("/")) {
            b = a.split("\\/");
            a = divide(b[0], check3(b[1])) ;
            return a;
        }

        else
            return a;
        //throw new UnsupportedOperationException("Not yet implemented");
    }

}

---------------------------------------------------------------------------------------------------------------------------------------------------------------------

Thanks

On Sun, Dec 30, 2007 at 11:10 PM, Pradyut Bhattacharya <pradyutb@gmail.com> wrote:

Java code to evaluate in arithmetic expression......

following order...
Division
Multiplication
Subtraction
Addition

The code: -

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
<snip>
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Reply any comments or suggestions.......

Thanks....

--
Pradyut
http://pradyut.tk
http://oop-edge.blogspot.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/
http://oop-edge.spaces.live.com/
http://www.flickr.com/photos/praddy
http://groups.google.com/group/oop_programming
India

--
Pradyut
http://pradyut.tk
http://www.pradyut.co.nr/
http://oop-edge.blogspot.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/
http://oop-edge.spaces.live.com/
http://groups.google.com/group/oop_programming
India

IT Companies Full Names...just don't miss it. :-)

2008-06-05T18:54:00.001+05:30

1. NIIT: Not Interested in IT

2. WIPRO: Weak Input, Poor & Rubbish Output

3. HCL: Hidden Costs & Losses

4. TCS : Totally Confusing Solutions

5. INFOSYS : Inferior Offline Systems

6. HUGHES : Highly Useless Graduates Hired for Eating and Sleeping

7. BAAN : Beggars Association and Nerds

8. IBM : Implicitly Boring Machines

9. SATYAM: Sad and Tired Yelling Away Madly

10. PARAM: Puzzled and Ridiculous Array of Microprocessors

11. C-DOT : Coffee during Office Timings

12. AT&T : All Troubles & Terrible

13. CMC : Coffee, Meals and Comfort

14. DEC : Drifting & Exhausted Computers

15. BFL : Brainwash first and Let them go

17. TISL : Totally Inconsistent Systems Ltd.

18. PSI : Peculiar Symptoms of India

19. ORACLE: On-line Romance And Chatting with Lady Employees .

20. PATNI : Pathetic Appraisal Techniques

--
Pradyut
http://pradyut.tk
http://oop-edge.blogspot.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/
http://oop-edge.spaces.live.com/
http://www.flickr.com/photos/praddy
http://groups.google.com/group/oop_programming
India

Re: simple css menu

2008-04-07T09:34:00.001+05:30

semi-transparent effect....

--
Pradyut
http://pradyut.tk
http://oop-edge.blogspot.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/
http://oop-edge.spaces.live.com/
http://www.flickr.com/photos/praddy
http://groups.google.com/group/oop_programming
India

forms authentication and session variables

2008-03-20T03:27:00.001+05:30

Forms authentication and session variables in asp.net

navigate between default and webform3 for sessions

navigate to webform2 for forms authentication

Sources at: -
http://myjavaserver.com/%7Epradyut/files/WebApplication2.zip

--
Pradyut
http://pradyut.tk
http://oop-edge.blogspot.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/
http://oop-edge.spaces.live.com/
http://www.flickr.com/photos/praddy
http://groups.google.com/group/oop_programming
India

changing to absolute positioning in visual web 2008

2008-03-16T22:18:00.001+05:30

changing to absolute positioning visual web in visual studio 2008

In VWD 2008 express goto Tools --> Options --> click show all settings --> expand HTML Designer --> select CSS Styling
check the option to "change positioning to absolute for controls added using Toolbox, paste or drag and drop

Now most controls will be able to placed anywhere on the design view. To be able to place Label's anywhere, first add a div (from the html toolbox) and then add the Label control onto the div area in the designer. Now select that div and you can easily position the Label.

Thanks
--
Pradyut
http://pradyut.tk
http://oop-edge.blogspot.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/
http://oop-edge.spaces.live.com/
http://www.flickr.com/photos/praddy
http://groups.google.com/group/oop_programming
India

Re: simple css menu

2008-03-15T03:47:00.001+05:30

A better css menu...

check it out...
http://myjavaserver.com/%7Epradyut/files/test2.html

Sources at: -
http://myjavaserver.com/%7Epradyut/files/my menu.zip

reply your comments....

Thanks...

On Fri, Mar 14, 2008 at 1:23 AM, Pradyut Bhattacharya wrote:

Extract the 3 files in the rar...

http://myjavaserver.com/%7Epradyut/files/my%20menu.rar

the only difference between new2.html and new3.html is: -

------------------------------------------------------------------------------------------------------------------
<STYLE TYPE="text/css" MEDIA="screen, projection">

</STYLE>
-------------------------------------------------------------------------------------------------------------------

wanna change the style.......... have fun with the css.........

Thanks.....

--
Pradyut
http://pradyut.tk
http://oop-edge.blogspot.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/
http://oop-edge.spaces.live.com/
http://www.flickr.com/photos/praddy
http://groups.google.com/group/oop_programming
India

simple css menu

2008-03-14T01:23:00.001+05:30

Extract the 3 files in the rar...

http://myjavaserver.com/%7Epradyut/files/my%20menu.rar

the only difference between new2.html and new3.html is: -

------------------------------------------------------------------------------------------------------------------
<STYLE TYPE="text/css" MEDIA="screen, projection">

</STYLE>
-------------------------------------------------------------------------------------------------------------------

wanna change the style.......... have fun with the css.........

Thanks.....

--
Pradyut
http://pradyut.tk
http://oop-edge.blogspot.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/
http://oop-edge.spaces.live.com/
http://www.flickr.com/photos/praddy
http://groups.google.com/group/oop_programming
India

A simple login application in J2ME

2008-02-16T02:06:00.001+05:30

A simple login application in j2me

Source in: -
http://www.myjavaserver.com/~pradyut/files/MobileApplication1%2016%20feb.zip

Will open as netbeans project

Mobile jar file:-
http://www.myjavaserver.com/~pradyut/files/MobileApplication1.jar

Thanks
--
Pradyut
http://pradyut.tk
http://oop-edge.blogspot.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/
http://oop-edge.spaces.live.com/
http://www.flickr.com/photos/praddy
http://groups.google.com/group/oop_programming
India

java code to evaluate a arithmetic expression....

2007-12-30T23:10:00.001+05:30

Java code to evaluate in arithmetic expression......

following order...
Division
Multiplication
Subtraction
Addition

The code: -

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public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        String a = "4-6-1+3*9/2"; //1*3+2*7-1-1
        String[] b = null;
        String c = null;
        //double[] d =null;
        Main obj = new Main();
        //double d1 = 0;
        System.out.println(obj.check(a));
        /*b = obj.mul (a);
        //a = b[0].substring(0, b[1].length()-1) + func2(func3(b[0].trim()), b[1]).toString() + b[]
        System.out.println(b[0].substring(obj.last(b[0])+1, b[0].length()));
        System.out.println(b[1].substring(0, obj.first(b[1])));
        c = obj.mult(b[0].substring(obj.last(b[0])+1, b[0].length()), b[1].substring(0, obj.first(b[1])));
        System.out.println(d1);

        a = b[0].substring(0, obj.last(b[0])+1) +d1 + b[1].substring( obj.first(b[1]), b[1].length());
        System.out.println("The string is: " + a);


        //System.out.print(func2(b[0].substring(0, func3(b[0].trim())), b[1].substring(func4(b[1].trim()), ));
        for(int i=0; i<b.length; i++)
            System.out.println(b[i]);

        //System.out.println(b[1].substring(0,b[1].indexOf('+')));

        //String f = b[1].substring(0,b[1].indexOf('+'));

        //d1 = obj.func2(b[0], f);
        System.out.println("The addition: " + d1);*/
    }
    double func(String a) {
        double d = 0;

        return d;
    }
    String mult(String a, String b) {
        double c = func1(a) * func1(b);
        return (Double.toString(c));
    }
    String minus(String a, String b) {

        double c = func1(a) - func1(b);
        System.out.println(c);
        return (Double.toString(c));
    }
    String add(String a, String b) {
        double c = func1(a) + func1(b);
        return (Double.toString(c));
    }

    String divide(String a, String b) {
        double c = func1(a) / func1(b);
        return (Double.toString(c));
    }

    double func1(String a) {
        double d =0;
        try {
            d = Double.parseDouble(a);
        } catch (NumberFormatException n1) {
            System.out.println(n1);
        }
        return d;
    }
    /*String[] mul(String a) {
        String[] b = null;
        b = a.split("\\*");
        return b;
    }
    double mul1(String[] a) {
        double c = 0;
        try{

        } catch()
        return c;
    }*/
    /*int last(String a) {
        int c=0;
        char d;
        for(int i =a.length()-1; i>0; i=i-1) {
            if(a.charAt(i)=='+' || a.charAt(i)=='-' || a.charAt(i)=='*' || a.charAt(i)=='/')
            return i;
        }
        return c;
    }
    int first(String a) {
        int i=0;
        for(i =0; i<a.length(); ++i) {
            if(a.charAt(i)=='+' || a.charAt(i)=='-' || a.charAt(i)=='*' || a.charAt(i)=='/')
            return i;
        }
        return i;
    }*/
    String check(String a) {
        String[] b=null;
        if(a.contains("+")) {
            //System.out.println("This is inside minus");
            b = a.split("\\+",2);

            a=add(check1(b[0]),check(b[1])) ;
            return a;
        }
        else
            return check1(a);
    }

    private String check1(String a) {

        String[] b=null;
        //System.out.println(a);
        if(a.contains("-")) {
            //System.out.println("This is inside minus");
            /*if(a.indexOf('-')!=0) {
                b = a.split("\\-",2);
            b[1] = "-" + b[1];
            a = add(check2(b[0]), check1(b[1])) ;
            }
            else {
                a = add(check2(b[0]), b[1]) ;
            }*/
            if(a.indexOf('-')==0)
            {
                a =a.substring(1);
                if( a.contains("-")) {
                    b = a.split("-", 2);
                    b[0] = "-" + b[0];
                    b[1] = "-" + b[1];
                    a = add(check2(b[0]), check1(b[1]));
                }
                else
                    a = "-"+a;
            } else {
                b = a.split("-", 2);
                //b[0] = "-" + b[0];

                b[1] = "-" + b[1];
                a = add(check2(b[0]), check1(b[1]));
            }
            return a;
        }else
            return check2(a);
        //throw new UnsupportedOperationException("Not yet implemented");

    }

    private String check2(String a) {
        String[] b=null;
        if(a.contains("*")) {
            b = a.split("\\*",2);
            a = mult(check3(b[0]), check2(b[1])) ;
            return a;
        }

        else
            return check3(a);
        //throw new UnsupportedOperationException("Not yet implemented");
    }

    private String check3(String a) {
        String[] b=null;
        if(a.contains("/")) {
            b = a.split("\\/");
            a = divide(b[0], check3(b[1])) ;
            return a;
        }

        else
            return a;
        //throw new UnsupportedOperationException("Not yet implemented");
    }
}

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Reply any comments or suggestions.......

Thanks....

--
Pradyut
http://pradyut.tk
http://oop-edge.blogspot.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/
http://oop-edge.spaces.live.com/
http://www.flickr.com/photos/praddy
http://groups.google.com/group/oop_programming
India

creating sql server JDBC pool

2007-12-14T11:32:00.000+05:30

Creating Sql Server 2005 JDBC connection pool in Glassfish v2

First we copy sqljdbc.jar file from the sql server jdbc driver distributed from Microsoft available here to the path \Program Files\glassfish-v2-b58g\lib.

Then we open the admin console. The snapshot: -

In resources->JDBC->Connection Pool

The main thing here: -

The name should not contain underscore or other special characters or it may not work

DataSource className: - com.microsoft.sqlserver.jdbc.SQLServerXADataSource

Resource Type: - javax.sql.XADataSource

In the Additional Properties the parameters should be correrct: -

check out the sql server 2005 port number from
Sql server Configuration Manager->Sql Server 2005 network configuration->Protocols for SqlExpress. If the TCP/IP is disabled, enable it.

Right click on TCP/IP -> properties

In the IP addresses tab, in IPAll see the parameter for TCP Dynamic Ports.

same should be in the portNumber in Glassfish server

Save the settings and test the connection by Ping button on the page.

create a JDBC resource using the JDBC connection pool: -

creating a connection to the JDBC resource (from a web page) using the code: -

try {
Context ctx = new InitialContext();
DataSource ds = (DataSource) ctx.lookup("test");
Connection c = ds.getConnection();
Statement st = c.createStatement();
ResultSet rs = st.executeQuery("....");
.............

...............

c.close();
} catch(NamingException e1) {
label1.setText("Naming exception: " + e1);
} catch (SQLException e2) {
label1.setText("Sql exception: " + e2);
}

the imports should be: -

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;

reply your comments.... thanks

Pradyut
http://pradyut.tk
http://pradyutb.googlepages.com/
http://oop-edge.blogspot.com/
http://oop-edge.spaces.live.com/
http://www.flickr.com/photos/praddy
http://groups.google.com/group/oop_programming
New Delhi, India

jsf projects

2007-11-06T02:58:00.001+05:30

Jsf projects created in netbeans.......

http://myjavaserver.com/~pradyut/files/jsf%20projects/

Has one directory and a sql file(run on sql server or other database)

JDBC Pooling required in the server.

Directory - open as a Netbeans project in Netbeans.

Waiting for ur comments

--
Pradyut
http://pradyut.tk
http://oop-edge.blogspot.com/
http://pradyutb.blogspot.com/
http://praddy-photos.blogspot.com/
http://oop-edge.spaces.live.com/
http://www.flickr.com/photos/praddy
http://groups.google.com/group/oop_programming
India

Myjavaserver sign up code cracked.....

2007-10-22T20:45:00.001+05:30

The sign up code at myjavaserver cracked.......

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if((config[2].compareTo(config[0])) > (config[0].compareTo(config[2]))) {
if (requestUri.contains(config[2]))
return config[3];
else if (requestUri.contains(config[0]))
return config[1];
else return "xxxxx";
} else {
if (requestUri.contains(config[0]))
return config[1];
else if (requestUri.contains(config[2]))
return config[3];
else return "xxxxx";
}
--------------------------------------------------------------------------------------------------------------------------

Make sure to check the line before example input:

If no handler can be found, "XXXXX" must be returned.

Make the appropriate changes in the code.....

and don't forget to remove the semicolon.......

returning array pointer

2007-07-02T02:19:00.000+05:30

This programs shows to return a function pointer: -

----------------------------------------------------------------------------------------------------------

#include <stdio.h>

#define NINE 9

void func(int a[], int size);
int *func2(void);

int main(void)
{
int a[] = {3,2,4};
int *(*j)(void) = func2;

func(a, sizeof a / sizeof *a);
printf("\nTraversing second list\n");
func(j(), NINE);
return 0;
}

void func(int a[], int size)
{
int i;

for (i = 0; size > i; i++) {
printf("%d\n", a[i]);
}
}

int *func2(void)
{
static int b[NINE] = {112,3,4,5,6,7,9,4,10};

return b;
}

----------------------------------------------------------------------------------------------------------

Courtesy: -
http://groups.google.com/group/comp.lang.c/browse_thread/thread/7d03fbafd8f5c6c9/#

c++ program to show the sequence of output from derived class

2007-05-05T12:44:00.001+05:30

//Show the sequence of output from derived class

#include <iostream>

#include <conio.h>

using namespace std;

class Abc

{

public:

Abc()

{

cout<<"This is inside ABC" <<endl;

}

void show()

{

cout <<"This is the show method" <<endl;

}

};

class New : public Abc

{

public:

New()

{

cout <<"This is inside New" <<endl;

}

};

int _tmain(int argc, _TCHAR* argv[])

{

cout <<"testing" <<endl;

New obj;

obj.show();

getch();

return 0;

}

OUTPUT:

testing

This is inside ABC

This is inside New

This is the show method

C++ program to show constructor to initialize base class

2007-05-02T21:16:00.000+05:30

//shows constructor to initialize base class

#include <iostream.h>

class Nine

{

public:

int x, y;

Nine(int a, int b)

{

x=a;

y=b;

}

void showdata()

{

cout <<"The values are: " <<x <<" and " <<y;

}

};

class Ten: public Nine

{

int l,m;

public:

Ten(int w, int d) : Nine(w,d)

{

l=w;

m=d;

}

void showdata()

{

cout <<"The values are: " <<l <<" , " <<m <<" , " <<x <<" , " <<y;

}

};

int main()

{

//Nine obj1(3,4);

Ten obj2(5,6);

//obj1.showdata();

obj2.showdata();

return 0;

}

c++ program to show difference in base class values

2007-05-02T21:14:00.001+05:30

//shows difference in base class values

#include <iostream.h>

class High

{

public:

int d, m;

void getdata(int a, int b)

{

d=a;

m=b;

}

void showdata()

{

cout <<"The values are: " <<d <<" , " <<m <<endl;

}

};

class Low: public High

{

int g,l;

public:

void getdata(int a, int b)

{

g=a;

l=b;

}

void showdata()

{

//trash values for base class members d and m

cout <<"The values are: " <<g <<" , " <<l << " , " <<d <<" , " <<m <<endl;

d=g;

m=l;

}

void showdata1()

{

//values for d and m after showdata initialization

cout <<"The values are: " <<g <<" , " <<l << " , " <<d <<" , " <<m;

}

};

int main()

{

High obj1;

obj1.getdata(4,5);

Low obj2;

obj2.getdata(5,6);

obj1.showdata();

obj2.showdata();

obj2.showdata1();

return 0;

}

c++ program to show parameterized constructor

2007-05-02T21:09:00.001+05:30

//shows parameterized constructor
#include <iostream.h>

class Gear
{
int x, y;
public:
Gear(int a, int b)
{
x = a;
y = b;
}

void showdata()
{
cout <<"The values are: " <<x <<" and " <<y;
}
};

int main(void)
{
Gear obj(3,4);
obj.showdata();
return 0;
}

Some Cakes!! wanna have one!?

2007-03-27T23:29:00.000+05:30

Some cakes...

Calling non-static function from static function

2007-02-06T00:31:00.000+05:30

Java code shows calling non-static function from static function main

code: -

--------------------------------------------------------------------------------------------------------------------

public class Main {

    /** Creates a new instance of Main */
    /*static Gear obj = new Gear();*/
    public Main() {
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        System.out.println("test");
        /*NewClass obj = new NewClass();
       System.out.println (obj.addn(8));*/
       //Gear t =new Gear();
       Main.Gear t =new Main().new Gear();
       //Main t = new Main();
       t.Jam();
    }

    public /*static*/ class Gear
    {
        public void Jam()
        {
            System.out.println("Testing");
        }
    }
}
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