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该例子共有2个类文件和一个图片文件夹
MainFrame类:定义程序界面SetTrayIcon类:定义程序系统托盘功能
使用规则:SetTrayIcon类可以不用修改,直接使用.只需要在程序构造函数中插入两句即可:第一句:new SetTrayIcon(this);&//调用SetTrayIcon(JFrame)类,设置程序系统托盘功能第二句:this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);&//关键.设置窗口关闭处理,与关闭窗体事件搭配
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MainFrame extends JFrame
//以下两标签为窗口界面图片
JLabel l_img2;
public MainFrame()
l_img=new JLabel(new ImageIcon(this.getClass().getClassLoader().getResource("images//netbean1.png")));
l_img2=new JLabel(new ImageIcon(this.getClass().getClassLoader().getResource("images//netbean2.png")));
l_img.setBounds(15,15,l_img.getIcon().getIconWidth(),l_img.getIcon().getIconHeight());
l_img2.setBounds(15,15+l_img.getIcon().getIconHeight()+20,l_img2.getIcon().getIconWidth(),l_img2.getIcon().getIconHeight());
add(l_img);
add(l_img2);
this.setTitle("Java托盘测试");
this.setSize(500,350);
this.setResizable(false);
this.setLayout(null);
center(); //调用窗体于屏幕居中函数
new SetTrayIcon(this); //调用SetTrayIcon(JFrame)类,设置程序系统托盘功能
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE); //关键.设置窗口关闭处理,与关闭窗体事件搭配
// 设置窗体于屏幕居中函数
private void center()
Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize();
//获得屏幕的尺寸
Dimension jframeSize=this.getSize(); //获得程序尺寸
setLocation((screenSize.width-jframeSize.width)/2,(screenSize.height-jframeSize.height)/2);
public static void main(String[] args)
new MainFrame();
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class
SetTrayIcon implements ActionListener
MenuItem open,
TrayI //任务栏程序托盘图标
public SetTrayIcon(JFrame jframe)
this.jframe=
initComponents(); //初始化程序托盘组件
//设置编译阶段禁用警告提示
@SuppressWarnings("unchecked")
//初始化程序托盘组件
private void initComponents()
pop=new PopupMenu();
open=new MenuItem("打开");
open.addActionListener(this);
close=new MenuItem("退出");
close.addActionListener(this);
pop.add(open);
pop.add(close);
//检查平台是否受支持系统托盘
if(SystemTray.isSupported())
SystemTray tray=SystemTray.getSystemTray();
ImageIcon imageIcon=new ImageIcon("images/user_edit.png");
//获得托盘显示图标
Image icon=imageIcon.getImage(); //获得Image对象
//Image icon=this.getToolkit().getImage(this.getClass().getClassLoader().getResource("images/user_edit.png"));
trayicon=new TrayIcon(icon,"java系统托盘",pop);
//为托盘添加鼠标事件,双击则打开程序界面
trayicon.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e)
if(e.getClickCount()==2)
openFrame();
tray.add(trayicon);
}catch(AWTException e)
e.printStackTrace();
//为程序添加窗体事件
jframe.addWindowListener(new WindowListener(){
public void windowActivated(WindowEvent arg0) {
// TODO Auto-generated method stub
//隐藏程序于系统托盘函数
public void windowClosed(WindowEvent arg0) {
// TODO Auto-generated method stub
jframe.setVisible(false);
jframe.dispose();
public void windowClosing(WindowEvent arg0) {
// TODO Auto-generated method stub
int a=JOptionPane.showConfirmDialog(jframe,"按 [是] 退出,[否] 隐藏?","提示",0);
if(a==0){System.exit(0);}
else if(a==1){jframe.setVisible(false);}
public void windowDeactivated(WindowEvent arg0) {
// TODO Auto-generated method stub
public void windowDeiconified(WindowEvent arg0) {
// TODO Auto-generated method stub
//窗口最小化
public void windowIconified(WindowEvent arg0) {
// TODO Auto-generated method stub
jframe.setVisible(false);
//jframe.dispose();
public void windowOpened(WindowEvent arg0) {
// TODO Auto-generated method stub
//为右击托盘菜单添加事件
public void actionPerformed(ActionEvent e)
if(e.getSource()==open)
openFrame();
if(e.getSource()==close)
System.exit(-1);
//显示程序界面函数
public void openFrame()
jframe.setVisible(true);
jframe.setAlwaysOnTop(true);
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I have a bunch of JLabels and i would like to trap mouse click events. at the moment i am having to use:
public void mouseClicked(MouseEvent arg0) {
public void mouseExited(MouseEvent arg0) {
public void mouseEntered(MouseEvent arg0) {
public void mousePressed(MouseEvent arg0) {
public void mouseReleased(MouseEvent arg0) {
System.out.println("Welcome to Java Programming!");
I was wondering if there is a tidier way of doing this instead of having a bunch of events I do not wish trap?
class MyAdapter extends MouseAdapter {
public void mouseClicked(MouseEvent event) {
System.out.println(event.getComponent());
the above works but netBeans says add @override anotation. what does this mean?
EDIT: ok got it. fixed and solved.
2,071144893
Use MouseAdapter()
An abstract adapter class for receiving mouse events. The methods in this class are empty. This class exists as convenience for creating listener objects.
So you need to implement only the method you like such as following example:
import java.awt.event.MouseA
import java.awt.event.MouseE
import javax.swing.JF
import javax.swing.JP
public class MainClass extends JPanel {
public MainClass() {
addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent me) {
System.out.println(me);
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.getContentPane().add(new MainClass());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(200, 200);
frame.setVisible(true);
10.3k22546
One could use a
class, which implements the
interface, so one does not need to implement all the methods.
However, by overriding the methods of interest, one can get the desired behavior. For example, if one overrides the mouseClicked method, then one can define some behavior for the mouse click event.
For example (untested code):
JLabel label = new JLabel("Hello");
label.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
System.out.println("Clicked!");
In the code above, the JLabel will print "Clicked!" to the console upon being clicked on.
85k15152196
You can extend
instead, and just override the events you're really interested in.
182k119413704
You can inherit from java.awt.event.MouseAdapter and only override the methods for the event(s) you are interested in.
20.7k53861
some example of mouse event clicked,
in the same way you can use mousePressed or other mouse events
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Work1 extends JFrame{
private JPanel panelN
public Work1(){
super("Work 1");
// create Panel
panelNew = new JPanel();
panelNew.setLayout(null);
panelNew.setBackground(Color.cyan );
add(panelNew);
// create Button
JButton btn = new JButton("click me");
// position and size of a button
btn.setBounds(100, 50, 150, 30);
panelNew.add(btn);
// add event to button
btn.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent me) {
// change text of button after click
if (btn.getText() == "abraCadabra"){
btn.setText("click me again") ;
btn.setText("abraCadabra");
public static void main(String[] args){
Work1 go1 = new Work1();
go1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
go1.setSize(320,200);
go1.setVisible(true);
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