testevent.java

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

public  class  TestEvent  extends  Applet  implements  KeyListener
{
	String s="";
	public void init()
	{
		addKeyListener(this);
		requestFocus();
	}
	public void paint(Graphics g)
	{
		g.drawString(s,20,20);
	}
	public  void keyPressed(KeyEvent e)
	{
		char ch;
		int code;
		ch=e.getKeyChar( );
		code=e.getKeyCode( );
		if (((ch>='a')&&(ch<='z') )|| ((ch>='A')&&(ch<='Z')) )
			s="你刚才敲的字母是 "+ch+" 其键盘码为 "+code;
		else
			s="你刚才敲的不是字母                         ";
		repaint( );
	}
	public  void keyReleased(KeyEvent e)
	{}
	public  void keyTyped(KeyEvent e)
	{	}
}