MouseAdapter
类是一个用于接收鼠标事件的抽象(适配器)类。此类的所有方法都是空的。此类是用于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
编号 | 构造函数 | 描述说明 |
---|---|---|
1 | MouseAdapter() |
无参数构造函数 |
类方法
编号 | 类方法 | 描述说明 |
---|---|---|
1 | void mouseClicked(MouseEvent e) |
在组件上单击(按下并释放)鼠标按钮时调用。 |
2 | void mouseDragged(MouseEvent e) |
在组件上按下鼠标按钮然后拖动时调用。 |
3 | void mouseEntered(MouseEvent e) |
鼠标进入组件时调用。 |
4 | void mouseExited(MouseEvent e) |
鼠标退出组件时调用。 |
5 | void mouseMoved(MouseEvent e) |
将鼠标光标移动到组件但未按下任何按钮时调用。 |
6 | void mousePressed(MouseEvent e) |
在组件上按下鼠标按钮时调用。 |
7 | void mouseReleased(MouseEvent e) |
在组件上释放鼠标按钮时调用。 |
8 | void mouseWheelMoved(MouseWheelEvent e) |
旋转鼠标滚轮时调用。 |
方法继承
该类继承以下类中的方法 -
java.lang.Object
MouseAdapter示例
使用编辑器创建以下Java程序:MouseAdapterDemo.java
package com.yiibai.swing.listener;
import javax.swing.*;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.*;
public class MouseAdapterDemo {
private JFrame mainFrame;
private JLabel headerLabel;
private JLabel statusLabel;
private JPanel controlPanel;
public MouseAdapterDemo() {
prepareGUI();
}
public static void main(String[] args) {
MouseAdapterDemo swingAdapterDemo = new MouseAdapterDemo();
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.blue);
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("欢迎您来到易百教程/Swing", 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);
}
}
执行上面示例代码,得到以下结果: