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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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