Command line argument

[denisatandi]

I'm new to Java, can someone please tell me how you can use a command line argument to print a message several times? Say if you wanted to print Hello world three times and you have to enter 3 for the message to print three times.
Thank you

[Eranga]

In Java command-line arguments are passes to the application main method using an array of strings.

Code:

public static void main (String[] arguments)
{
// Body of the main method.
}

If you want to use a numeric value, you have to get it from a string array. Something like this,

Code:

int numericValue = Integer.parseInt(arguments[0]);

this line of code gives a numeric value. So in your application you can do this.

Code:

class Test
{
public static void main(String[] arguments)
{
int numberOfTurns = Integer.parseInt(arguments[0]);
while(0 < numberOfTurns)
{
System.out.println("Hello World");
numberOfTurns--;
}
}
}

[ferranb]

Notice that in java the argument 0 is not the executable like others languages like C/C++.

Ferran

[Eranga]

I'm not clear what you are talking about. In my explanation, I'm not talking about anything related to executable commands. Basically over friend felt difficult with how to handle command line arguments in Java. May be the following code snippets can be helped. But I don't want to send this earlier because there is no response from thread starter.

Code:

class Test {
	public static void main(String[] arguments) {
		else if(arguments.length == 2){
			String text = arguments[0];
			int terms = Integer.parseInt(arguments[1]);
			for(int i = 0; i < terms; i++) {
				System.out.println(text);
			}
		}
		else {
			System.out.println("Invalid");
		}
	}
}

Here you need two command parameters to run the code.