Simple Java Keypresser

import java.awt.Robot;
import java.awt.event.KeyEvent;
import java.awt.AWTException;

public class KeyPresser {
	public static void main(String[] args) {
		
		int delay = 0;
	
		try {
			delay = Integer.parseInt(args[0], 10);
			Robot robot = new Robot();
		
			while (true) {
				robot.delay(delay*1000);
				robot.keyPress(KeyEvent.VK_ENTER);
				robot.delay(10);
				robot.keyRelease(KeyEvent.VK_ENTER);
			}
		} catch (ArrayIndexOutOfBoundsException e) {
			System.err.println("First parameter need to be a number");
			System.exit(1);
		} catch (NumberFormatException e) {
			System.err.println("First parameter need to be a number");
			System.exit(1);
		} catch (Exception e) {
			System.err.println("Unexpected error" + e.toString());
			System.exit(1);
		}
	}
}