testkeyevent.java

事件的处理

import java.awt.*;
import java.awt.event.*;
public class TestKeyEvent extends Frame {

  private TextArea testTA;
 
  public static void main(String args[]){
    TestKeyEvent test=new TestKeyEvent();
    test.setSize(300,200);
    test.setVisible(true);
  }

  public TestKeyEvent(){
    testTA=new TextArea();
    testTA.setEnabled(false);
    add(testTA,BorderLayout.CENTER);
    Button testButton=new Button("test");
    testButton.addKeyListener(new KeyListen(this));
    add(testButton,BorderLayout.SOUTH);
  }

  public void ShowMessage(String str){
    testTA.append(str+"\n");
  }

}

class KeyListen implements KeyListener{

  private TestKeyEvent testkey0;
  public KeyListen(TestKeyEvent testkey1){
    testkey0=testkey1;
  }
  public void keyPressed(KeyEvent e){
  }
  public void keyReleased(KeyEvent e){
    testkey0.ShowMessage("key char="+e.getKeyChar());
    testkey0.ShowMessage("key code="+e.getKeyCode());
    testkey0.ShowMessage("modifier="+e.getModifiers());
  }
  public void keyTyped(KeyEvent e){
  }
}