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() + ")");
}
}