import java.applet.*; 
import java.awt.*; 
import java.awt.event.*; 

public class MyApplet extends Applet implements KeyListener 
{ 
  private TextField Input; 

  public void init() 
  { 
    Input = new TextField(10); 
    Input.addKeyListener(this); 
    add(Input); 
  } 

  public void keyReleased(KeyEvent ev) 
  { 
    switch (ev.getKeyCode()) 
    { 
      case KeyEvent.VK_ENTER: 
      { 
        Input.setForeground(Color.red); 
        break; 
      } 
      case KeyEvent.VK_TAB: 
      { 
        Input.setForeground(Color.green); 
        break; 
      } 
      case KeyEvent.VK_CAPS_LOCK: 
      { 
        Input.setForeground(Color.yellow); 
        break; 
      } 
      default: 
      { 
        Input.setForeground(Color.blue); 
        break; 
      } 
    } 
  } 

  public void keyTyped(KeyEvent ev) { } 
  public void keyPressed(KeyEvent ev) { } 
}