java中系统托盘的实现

很明显，JAVA中的系统托盘，如果要实现，重要的是两个类，一个是SystemTray，而另一个是TrayIcon。需要为TrayIcon设置好图片，它需要显示的信息以及右键点击的PopupMenu.PopupMenu的使用很简单，就是将需要的MenuItem添加入PopupMenu中。

以下是一段示例代码，用于表明系统托盘如何实现。

import java.awt.*;

import java.awt.TrayIcon.MessageType;

import java.awt.event.*;

import javax.swing.*;

public class MainFrame extends JFrame implements ActionListener{

private JLabel jl1,jl2;

private JTextField jt_username;

private JPasswordField jp_password;

private JButton jb_enter,jb_exit;

private TrayIcon trayicon;

private void initCompoenent()

{

setSize(300,200);

setLayout(new GridLayout(3,2));

jl1=new JLabel("用户名：");

jl2=new JLabel("密码：");

jt_username=new JTextField();

jp_password=new JPasswordField();

jb_enter=new JButton("登陆");

jb_exit=new JButton("退出");

jb_enter.addActionListener(this);

jb_exit.addActionListener(this);

add(jl1);

add(jt_username);

add(jl2);

add(jp_password);

add(jb_enter);

add(jb_exit);

setVisible(true);

}

@Override

public void actionPerformed(ActionEvent ex) {

// TODO Auto-generated method stub

if(ex.getSource().equals(jb_enter))

{

String username=jt_username.getText().toString().trim();

String password=String.copyValueOf(jp_password.getPassword());

if(username.equals("passzh")&&password.equals("1988"))

{

JOptionPane.showMessageDialog(null, "登陆成功");

}

else

{

JOptionPane.showMessageDialog(null, "用户名或密码错误");

}

}

else if(ex.getSource().equals(jb_exit))

{

System.exit(0);

}

else if(ex.getSource().equals(trayicon))

{

if(!isVisible())

{

setVisible(true);

toFront();

}

}

}

public MainFrame()

{

initCompoenent();

if(!SystemTray.isSupported())

{

return;

}

else

{

SystemTray systemTray=SystemTray.getSystemTray();

String title="登陆窗口";

String company="passZh write";

Image image=Toolkit.getDefaultToolkit().getImage(getClass().getResource("image/sysTray.png"));

trayicon=new TrayIcon(image,title+"/n"+company,createMenu());

trayicon.addActionListener(this);

try {

systemTray.add(trayicon);

trayicon.displayMessage(title, company, MessageType.INFO);

} catch (AWTException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

private PopupMenu createMenu()

{

PopupMenu menu=new PopupMenu();

MenuItem exit=new MenuItem("关闭");

exit.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent ex)

{

System.exit(0);

}

});

MenuItem open=new MenuItem("打开");

open.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent ex)

{

if(!isVisible())

{

setVisible(true);

toFront();

}

else

{

toFront();

}

}

});

menu.add(open);

menu.addSeparator();

menu.add(exit);

return menu;

}

public static void main(String[] args)

{

MainFrame mai=new MainFrame();

}

}