import java.awt.*;
import java.awt.event.*;public class MyKeyEvent
{
public static void main(String[] args)
{
MyFrame frm=new MyFrame();
frm.show();
}
}/*带按钮板的窗体*/
class MyFrame extends Frame
{
boolean w;
public MyFrame()
{
w=false;
setTitle("测试键盘事件");
setSize(300,200);
MyPanel panel=new MyPanel();
add(panel);
addWindowListener(new MyWindowAdapter());
}
private class MyWindowAdapter extends WindowAdapter
{
public void windowClosing(WindowEvent wevent)
{
if(w)
dispose();
else
System.exit(0);
}
}
}/*带一个按钮的面板*/class MyPanel extends Panel
{
public MyPanel()
{
//创建文本域
TextField tField=new TextField(20);
//将按钮添加到面板
add(tField);
MyKeyAdapter bAction=new MyKeyAdapter();
//将监听器对象添加到文本域
tField.addKeyListener(bAction);
}
/*覆盖KeyAdapter类的keyPressed,KeyReleased,keyTyped方法,但是KeyReleased,keyTyped的方法在输入时却没有反应。不知道是怎么回事*/
private class MyKeyAdapter extends KeyAdapter
{
public void keyPressed(KeyEvent kevent)
{
setBackground(Color.red);
repaint();
}
public void KeyReleased(KeyEvent kevent)
{
setBackground(Color.black);
repaint();
}
public void KeyTyped(KeyEvent kevent)
{
if(kevent.getKeyChar() == 'x')
System.exit(0);
}
}
}
import java.awt.event.*;public class MyKeyEvent
{
public static void main(String[] args)
{
MyFrame frm=new MyFrame();
frm.show();
}
}/*带按钮板的窗体*/
class MyFrame extends Frame
{
boolean w;
public MyFrame()
{
w=false;
setTitle("测试键盘事件");
setSize(300,200);
MyPanel panel=new MyPanel();
add(panel);
addWindowListener(new MyWindowAdapter());
}
private class MyWindowAdapter extends WindowAdapter
{
public void windowClosing(WindowEvent wevent)
{
if(w)
dispose();
else
System.exit(0);
}
}
}/*带一个按钮的面板*/class MyPanel extends Panel
{
public MyPanel()
{
//创建文本域
TextField tField=new TextField(20);
//将按钮添加到面板
add(tField);
MyKeyAdapter bAction=new MyKeyAdapter();
//将监听器对象添加到文本域
tField.addKeyListener(bAction);
}
/*覆盖KeyAdapter类的keyPressed,KeyReleased,keyTyped方法,但是KeyReleased,keyTyped的方法在输入时却没有反应。不知道是怎么回事*/
private class MyKeyAdapter extends KeyAdapter
{
public void keyPressed(KeyEvent kevent)
{
setBackground(Color.red);
repaint();
}
public void KeyReleased(KeyEvent kevent)
{
setBackground(Color.black);
repaint();
}
public void KeyTyped(KeyEvent kevent)
{
if(kevent.getKeyChar() == 'x')
System.exit(0);
}
}
}
public void keyPressed(KeyEvent kevent) {
// do something.
}});