Java实现Windows、Mouse监听器

1、通过实现WindowListener接口来实现Windows监听器：

 import java.awt.event.WindowEvent;
 import java.awt.event.WindowListener;

 import javax.swing.JFrame;

 public class WindowsListenerFrame extends JFrame implements WindowListener  {

     public WindowsListenerFrame() {
         this.setTitle("窗体事件");
         setSize(600, 400);
         setResizable(false);
         setLocationRelativeTo(null);

         this.addWindowListener(this);
     }

     public static void main(String[] args) {
         JFrame frame = new WindowsListenerFrame();
         frame.setVisible(true);
     }

     @Override
     public void windowActivated(WindowEvent event) {
     }

     @Override
     public void windowClosed(WindowEvent arg0) {
     }

     @Override
     public void windowClosing(WindowEvent arg0) {
         this.dispose();
     }

     @Override
     public void windowDeactivated(WindowEvent arg0) {
     }

     @Override
     public void windowDeiconified(WindowEvent arg0) {
     }

     @Override
     public void windowIconified(WindowEvent arg0) {
     }

     @Override
     public void windowOpened(WindowEvent arg0) {
     }
 }

2、通过实现WindowAdapter接口来实现Windows监听器：

 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.awt.event.WindowListener;
 import javax.swing.JFrame;

 public class WindowAdapterFrame extends JFrame{
     public WindowAdapterFrame() {
         setTitle("窗体适配器");
         setSize(600, 400);
         setResizable(false);

         WindowListener listener =new WindowAdapter() {
             @Override
             public void windowClosing(WindowEvent e) {
                 dispose();
             }
         };
         this.addWindowListener(listener);
     }
     public static void main(String[] args) {
         JFrame frame=new WindowAdapterFrame();
         frame.setVisible(true);
     }
 }

3、通过实现MouseListener、MouseMotionListener接口来实现Mouse监听器：

 import java.awt.BorderLayout;
 import java.awt.Container;
 import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
 import java.awt.event.MouseMotionListener;

 import javax.swing.JFrame;
 import javax.swing.JLabel;

 public class MouseListenerFrame extends JFrame implements MouseListener, MouseMotionListener{
     JLabel lblStatus=null;
     public MouseListenerFrame() {
         setTitle("MouseListener");
         setSize(600, 400);
         setDefaultCloseOperation(EXIT_ON_CLOSE);
         setResizable(false);

         Container container =this.getContentPane();
         lblStatus=new JLabel();
         container.add(BorderLayout.SOUTH, lblStatus);

         container.addMouseListener(this);
         container.addMouseMotionListener(this);
     }
     /**
      *  值得注意的是String.format()方法的调用格式，是用","来隔开各个参数
      */
     @Override
     public void mouseClicked(MouseEvent event) {
         String msg=String.format("鼠标点击[%d, %d]",event.getX(),event.getY());
         lblStatus.setText(msg);
     }
     @Override
     public void mousePressed(MouseEvent e) {
         String button=null;
         if(MouseEvent.BUTTON1==e.getButton()) {
             button="左键";
         }else if(MouseEvent.BUTTON2==e.getButton()) {
             button="滚轮";
         }else if(MouseEvent.BUTTON3==e.getButton()) {
             button="右键";
         }
         String msg=String.format("鼠标 %s 按下[%d,%d]",button,e.getX(),e.getY());
         lblStatus.setText(msg);
     }
     @Override
     public void mouseReleased(MouseEvent e) {
         String msg=String.format("鼠标释放[%d,%d]",e.getX(),e.getY());
         lblStatus.setText(msg);
     }
     @Override
     public void mouseEntered(MouseEvent e) {
         String msg=String.format("鼠标进入[%d,%d]",e.getX(),e.getY());
         lblStatus.setText(msg);
     }
     @Override
     public void mouseExited(MouseEvent e) {
         String msg=String.format("鼠标退出[%d,%d]",e.getX(),e.getY());
         lblStatus.setText(msg);
     }
     @Override
     public void mouseDragged(MouseEvent e) {
         String msg=String.format("鼠标拖动，当前坐标 [%d,%d]",e.getX(),e.getY());
         lblStatus.setText(msg);
     }
     @Override
     public void mouseMoved(MouseEvent e) {
         String msg=String.format("鼠标移动，当前坐标 [%d,%d]",e.getX(),e.getY());
         lblStatus.setText(msg);
     }
     public static void main(String[] args) {
         JFrame frame=new MouseListenerFrame();
         frame.setVisible(true);
     }
 }

4、通过实现KeyListener接口来实现Key监听器：

 import java.awt.BorderLayout;
 import java.awt.Container;
 import java.awt.event.KeyEvent;
 import java.awt.event.KeyListener;

 import javax.swing.JFrame;
 import javax.swing.JLabel;
 import javax.swing.JTextArea;

 public class KeyListenerFrame extends JFrame implements KeyListener {
     // 1. 属性
     JLabel lblStatus = null;    

     // 2. 方法
     public KeyListenerFrame() {
         this.setTitle("鼠标事件");
         setSize(600, 400);
         setResizable(false);
         setLocationRelativeTo(null);
         setDefaultCloseOperation(EXIT_ON_CLOSE);

         Container contentPane = this.getContentPane();

         lblStatus = new JLabel();
         contentPane.add(BorderLayout.SOUTH, lblStatus);

         JTextArea txaEdit = new JTextArea();
         contentPane.add(BorderLayout.CENTER, txaEdit);

         txaEdit.addKeyListener(this);
     }

     public static void main(String[] args) {
         JFrame frame = new KeyListenerFrame();
         frame.setVisible(true);
     }

     @Override
     public void keyPressed(KeyEvent event) {
         lblStatus.setText("键盘按下: " + event.getKeyChar() + "(" + event.getKeyCode() + ")");
     }

     @Override
     public void keyReleased(KeyEvent event) {
         lblStatus.setText("键盘放开: " + event.getKeyChar() + "(" + event.getKeyCode() + ")");
     }

     @Override
     public void keyTyped(KeyEvent event) {
         lblStatus.setText("键盘敲击: " + event.getKeyChar() + "(" + event.getKeyCode() + ")");
     }
 }