Swing - MouseAdapter 类

介绍

MouseAdapter 类是一个用于接收鼠标事件的抽象（适配器）类。此类中的所有方法都是空的。此类是创建监听器对象的便捷类。

类声明

以下是 java.awt.event.MouseAdapter 类的声明：

public abstract class MouseAdapter
   extends Object
      implements MouseListener, MouseWheelListener, MouseMotionListener

类构造函数

类方法

继承的方法

此类继承自以下类的方法：

• java.lang.Object

MouseAdapter 示例

使用您选择的任何编辑器创建以下 Java 程序，例如在 D:/ > SWING > com > tutorialspoint > gui >

SwingAdapterDemo.java

package com.tutorialspoint.gui;

import java.awt.*;
import java.awt.event.*;

public class SwingAdapterDemo {
   private JFrame mainFrame;
   private JLabel headerLabel;
   private JLabel statusLabel;
   private JPanel controlPanel;

   public SwingAdapterDemo(){
      prepareGUI();
   }
   public static void main(String[] args){
      AwtAdapterDemo  awtAdapterDemo = new AwtAdapterDemo();  
      swingAdapterDemo.showMouseAdapterDemo();
   }
   private void prepareGUI(){
      mainFrame = new JFrame("Java SWING Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));

      headerLabel = new JLabel("",JLabel.CENTER );
      statusLabel = new JLabel("",JLabel.CENTER);        
      statusLabel.setSize(350,100);
      
      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            System.exit(0);
         }        
      });    
      controlPanel = new JPanel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }
   private void showMouseAdapterDemo(){
      headerLabel.setText("Listener in action: MouseAdapter");      
      JPanel panel = new JPanel();      
      panel.setBackground(Color.magenta);
      panel.setLayout(new FlowLayout());        
      
      panel.addMouseListener(new MouseAdapter(){
         public void mouseClicked(MouseEvent e) {
            statusLabel.setText("Mouse Clicked: ("+e.getX()+", "+e.getY() +")");
         }                
      });
      JLabel msglabel 
         = new JLabel("Welcome to TutorialsPoint SWING Tutorial.",JLabel.CENTER);
      
      msglabel.addMouseListener(new MouseAdapter(){
         public void mouseClicked(MouseEvent e) {
            statusLabel.setText("Mouse Clicked: ("+e.getX()+", "+e.getY() +")");
         }                
      });
      panel.add(msglabel);
      controlPanel.add(panel);
      mainFrame.setVisible(true);  
   }
}

使用命令提示符编译程序。转到 D:/ > SWING 并输入以下命令。

D:\SWING>javac com\tutorialspoint\gui\SwingAdapterDemo.java

如果未出现错误，则表示编译成功。使用以下命令运行程序。

D:\SWING>java com.tutorialspoint.gui.SwingAdapterDemo

验证以下输出。