Java Tutorial 12 – Command Line Arguments


During program execution, information passed following a programs name in the command line is called Command Line Arguments.
Example : While running a class Demo, you can specify command line arguments as
java Demo arg1 arg2 arg3 …

Command Line Arguments Important Points:

  • Command Line Arguments can be used to specify configuration information while launching your application.
  • There is no restriction on the number of command line arguments.You can specify any number of arguments
  • Information is passed as Strings.
  • They are captured into the String argument of your main method

Assignment: To Learn Command Line Arguments
Step 1) Copy the following code into a editor


class Demo{
     public static void main(String b[]){
         System.out.println("Argument one = "+b[0]);
         System.out.println("Argument two = "+b[1]);
    }
}

Step 2) Save & Compile the code
Step 3) Run the code as javac Demo apple orange
java-command-line-argument

Step 4) You must get an output as below.
java-command-line-argument-1

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