Java – “String args[]”? parameter in main method Java

command-line-argumentsjavamainparameters

I'm just beginning to write programs in Java. What does the following Java code mean?

public static void main(String[] args)
  • What is String[] args?

  • When would you use these args?

Source code and/or examples are preferred over abstract explanations

Best Solution

In Java args contains the supplied command-line arguments as an array of String objects.

In other words, if you run your program as java MyProgram one two then args will contain ["one", "two"].

If you wanted to output the contents of args, you can just loop through them like this...

public class ArgumentExample {
    public static void main(String[] args) {
        for(int i = 0; i < args.length; i++) {
            System.out.println(args[i]);
        }
    }
}