Key input

Question

How many possibilities are there to read the key-input?
I tried to use read() from System.in but I have to press return each time.

Answer 1

Assuming you're making an Applet (or a normal Swing GUI) you could use the KeyListener interface:
import java.applet.*;
import java.awt.event.*;
public class KeyProgram extends Applet implements KeyListener
     public void keyPressed(KeyEvent e)
          int key = e.getKeyCode();
          if (key == KeyEvent.VK_UP)
               //Do something when the up key is pressed
     public void keyTyped(KeyEvent e)
     public void keyReleased(KeyEvent e)
}You can check here for a list of all the key codes: http://java.sun.com/j2se/1.5.0/docs/api/java/awt/event/KeyEvent.html