假設想對一個鼠標的操作進行監聽，假設鼠標按下、松開等。則能夠使用MouseListener接口。

package com.beyole.util;

import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

class MyMouseHandle extends JFrame implements MouseListener {
	private JTextArea text = new JTextArea();

	public MyMouseHandle() {
		super.setTitle("Crystal");// 設置標題
		JScrollPane pane = new JScrollPane(text);// 增加滾動欄
		pane.setBounds(5, 5, 300, 200);// 設置絕對位置
		super.add(pane);// 向窗口中增加組件
		text.addMouseListener(this);// 增加mouse監聽
		super.setSize(310, 210);
		super.setVisible(true);
		super.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent arg0) {
				System.exit(1);
			}
		});
	}

	public void mouseClicked(MouseEvent e)// 鼠標單擊事件
	{
		int c = e.getButton();// 得到按下的鼠標鍵
		String mouseInfo = null;// 接收信息
		if (c == MouseEvent.BUTTON1)// 推斷是鼠標左鍵按下
		{
			mouseInfo = "左鍵";
		} else if (c == MouseEvent.BUTTON3) {// 推斷是鼠標右鍵按下
			mouseInfo = "右鍵";
		} else {
			mouseInfo = "滾軸";
		}
		text.append("鼠標單擊：" + mouseInfo + ".\n");
	}

	public void mouseEntered(MouseEvent e)// 鼠標進入組件
	{
		text.append("鼠標進入組件.\n");
	}

	public void mouseExited(MouseEvent e)// 鼠標退出組件
	{
		text.append("鼠標退出組件.\n");
	}

	public void mousePressed(MouseEvent e)// 鼠標按下
	{
		text.append("鼠標按下.\n");
	}

	public void mouseReleased(MouseEvent e)// 鼠標松開
	{
		text.append("鼠標松開.\n");
	}
}

public class MyMouseEventDemo {
	public static void main(String[] args) {
		new MyMouseHandle();
	}
}

Java Swing界面編程(25)---事件處理：鼠標事件及監聽處理