I Write Code

Variables and Names

2015-08-30T09:47:00.000-07:00

For Assignment Question Click Here

Code :

    //Call this file VariablesAndNames.java

    public class VariablesAndNames {

   public static void main(String args[]) {

                   int cars, drivers, passengers, cars_not_driven, cars_driven;

   double space_in_a_car, carpool_capacity, average_passengers_per_car;

   cars = 100;

   space_in_a_car = 4.0;

      drivers = 30;

      cars_driven = drivers;

                  passengers = 90;

      cars_not_driven = cars - drivers;

                  carpool_capacity = cars_driven * space_in_a_car;

average_passengers_per_car = passengers / cars_driven;


System.out.println( "There are " + cars + " cars available." );
System.out.println( "There are only " + drivers + " drivers available." );
System.out.println( "There will be " + cars_not_driven + " empty cars today." );
System.out.println( "We can transport " + carpool_capacity + " people today." );
System.out.println( "We have " + passengers + " to carpool today." );
System.out.println( "We need to put about " + average_passengers_per_car + " in each car." );

      }

}

Output:
> java VariablesAndNames

   There are 100 cars available.
   There are only 30 drivers available.
   There will be 70 empty cars today.
   We can transport 120.0 people today.
   We have 90 to carpool today.
   We need to put about 3.0 in each car.

Java Simple Program Explanation

2015-08-19T08:28:00.000-07:00

1. Multi Line Comment

i. The first few lines starting with "/*" and ending with "*/" are multi-line comments.
ii. Multi line comments are useful while describing about a method or a class to help other developers understand the code.

2. public class MyFirstClass

The line "public class MyFirstClass" states that a new class is being created.

3. public static void main (String[] args)

The meaning of "public static void main (String[] args)" is explained through the following figure.

1.   Public Access specifier allows the method to be accessed from outside the class.
2.   Static means that to call the main method an instance variable of the class is not required.
       It can be accessed directly using ClassName.functionName()
3.   void means that the method main does not return anything.
4.   The arguments String[] args means that main accepts as arrays of Strings.

4. Single Line Comment in Java

Single line comments start with // and are used often to provide short description of statement in a Java program.

5. System.out.println

The statement "System.out.println" prints the parameter passed to it on the console by default.
There are two variations of it:
1. print() : It prints in a single line and does not append a newline character at the end.
2. println() : It appends a newline character at the end.

Java Simple Program

2015-08-19T08:11:00.001-07:00

//Call this File "MyFirstClass.java"

/*
This is a sample Java Program
to help you kick-start with Java
*/

public class MyFirstClass {
   public static void main(String[] args) {
// The main() method is the starting point of execution of a Java Program
      System.out.println("Hurray!! My First Java Program actually Executes!!!");

    }

}

Output:
> java MyFirstClass
   Hurray!! My First Java Program actually Executes!!!

Your Initials

2015-08-19T07:53:00.000-07:00

    //Call this file Yourinitials.java

    public class Yourinitials {
      public static void main (String[] args) {

        System.out.println(" For the name Hamxa Malik..... ");

        System.out.println("     H H      M         M     ");
        System.out.println("     H H      MM    MM     ");
        System.out.println("     H H      MM    MM     ");
        System.out.println("     HHHHHHH      M    M    M     ");
        System.out.println("     H      H      M       M     ");
        System.out.println("     H            H      M   M     ");
        System.out.println("     H            H      M           M     ");

      }
    }

Output:
> java Yourinitials
                      For the name Hamxa Malik.....

   H H      M         M
               H H      MM    MM
         H H      MM    MM
           HHHHHHH      M    M    M
               H      H      M       M
               H            H      M   M
           H            H      M           M

In case you have no idea how to make a certain letter, there are some suggestions below.

BigLetters

Letter To Yourself

2015-08-19T06:35:00.002-07:00

     //Call this File LetterToYourself.java

    public class LetterToYourself {
public static void main (String[] args){

        System.out.println(" +---------------------------------------------------------+ ");
    System.out.println(" |                                                          | ");
        System.out.println(" |                                       Acer Laptop's    | ");
        System.out.println(" |                                           Mall Road     | ");
        System.out.println(" |                                   Lahore                | ");
        System.out.println(" |                                                            | ");
        System.out.println(" |                                       April 6 2015    | ");
        System.out.println(" |                                                            | ");
    System.out.println(" |                                                            | ");
        System.out.println(" |   Muhammad Hamxa                                         | ");
        System.out.println(" |   ABCD                                                 | ");
        System.out.println(" |   Multan                                                  | ");
    System.out.println(" |                                                          | ");
    System.out.println(" +---------------------------------------------------------+ ");

    }

}

Output:
> java LetterToYourself
            +--------------------------------------------------------------+
         |                                                        |
       |                                          Acer Laptop's     |
   |                                              Mall Road        |
         |                                      Lahore               |
         |                                                      |
         |                                          April 6 2015       |
       |                                                            |
           |                                                            |
       |   Muhammad Hamxa                                       |
           |   ABCD                                               |
       |   Multan                                                  |
       |                                                                |
    +--------------------------------------------------------------+

First Program in Java

2015-08-18T08:29:00.000-07:00

//Call this File "HelloWorld.java"

public class HelloWorld {
       public static void main (String[] args) {

       System.out.println("Hello World!!");

      }
}

Output:
> javac HelloWorld.java
> java HelloWorld
   HelloWorld!!

My First Blog Post! Hurray!!

2015-08-18T06:37:00.000-07:00

Hello folks. Welcome on my Blog.
This is Hamxa from Hamxacodeit.blogspot.com.
On this blog, I am posting my all Java Programming work, Assignments, Mini project, my Experience and Java articles. I hope this material helps Beginner's to Understand Java.