Command line arguments allow the user to affect the operation of an application. A Java application can accept any number of arguments from the command line. Arguments are passed as a string array to the main method of a class.

Here is an example:

public class CommandLineArguments{
      public static void main(String[] args){
         System.out.println("These are the command line arguments:");
          for (int i=0; i < args.length; i++){
             System.out.println("arg[" + i + "]: " + args[i]);
          }
    }
}

Now while executing this example, you need to give the arguments along with class name as below:

java CommandLineArguments A B C D

Please visit the following link:

http://www.roseindia.net/java/beginners/cmnd-line-arguments.shtml

Please visit the following link:

http://www.roseindia.net/java/beginners/cmnd-line-arguments.shtml