8 Steps to run Java Program using command prompt

8  Steps to run Java Program  using command prompt

Step 1: Write a Java code using notepad 

            For example:- 

                                   class HelloWorld

                                           {  

                                                 public static void main(String args[])

                                                 {

                                                       System.out.println("Hello  Java");

                                                  }

                                           }

Step 2: Save it as HelloWorld.java  (For example : It is saved in  C:\Users\comp\Java Practiced program).

Step 3: Set environment variable . 

Right Click  on  MyComputer -> Properties -> Advanced System settings -> Inside Advanced tab

 Click Environment variables -> Inside System Vaiables click  New   ->  Give variable name (For example  var) -> Give variable value. It  is path in your system where java compiler is available  (For example  variable value :C:\Program Files\Java\jdk1.6.0_23\bin ). Inside bin  javac   is Java compiler.

Click Ok.

Step 4: Go to command prompt by using start->Run->cmd  OR  start-> type cmd in search program and file.

Press Enter.

Step  5:Use the following command to  go the  folder where previous Java program is stored.

           cd  C:\Users\comp\Java Practiced program

Press enter

Step 6 :  Set path of Compiler.  It  is path in your system where java compiler is available 

               For example,  set path=C:\Program Files\Java\jdk1.6.0_23\bin;

 Press enter

Step 7: Write following command for compilation of program

           javac  HelloWorld.java

 Press Enter

Step 8: To run program use following command

              java  HelloWorld

Now  output is shown :  Hello Java

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