Introduction to using Java to implement the system tray function (with source code and screenshots)

import java.awt.AWTException;
import java.awt.MenuItem;
import java.awt.PopupMenu;
import java.awt.SystemTray;
import java.awt.TrayIcon;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.URL;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;

public class MainFrame extends JFrame implements ActionListener{

private static final long serialVersionUID = -7078030311369039390L;
private JMenu menu;
private JMenuBar jmenuBar;
private String [] jmItemName = {"Place in tray","System exit"};

public MainFrame(){
super("phone book");
init();
this.setSize(500,400);
this.setJMenuBar(jmenuBar);
this.setLocationRelativeTo(null);
systemTray(); //system tray
}

/**
* Initialization interface
*/
public void init(){
menu = new JMenu("System Form");
for(int i=0; i<jmItemName.length; i++){
JMenuItem menuItem = new JMenuItem(jmItemName[i]);
menuItem.addActionListener(this);
menu.add(menuItem);
}
this.jmenuBar = new JMenuBar();
this.jmenuBar.add(menu);
}

@Override
public void actionPerformed(ActionEvent e) {
String actions = e.getActionCommand();
if("Place on tray".equals(actions)){
this.setVisible(false);
}
if("System exit".equals(actions)){
System.exit(0);
}

}

/**System tray icon processing.*/
private void systemTray(){
if(SystemTray.isSupported()){ //Determine whether the system supports the tray function.
URL resource = this.getClass().getResource("systray.jpg"); //Get the image path
ImageIcon icon = new ImageIcon(resource); //Create image object
PopupMenu popupMenu = new PopupMenu(); //Create a popup menu object
MenuItem itemExit = new MenuItem("Exit the system"); //Create the exit item in the pop-up menu
MenuItem itemShow = new MenuItem("Display form"); //Create a display main form item in the pop-up menu.
itemExit.addActionListener(new ActionListener() { //Add an event listener to the exit image
@Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
itemShow.addActionListener(new ActionListener() { //Add an event listener to minimize the form.
@Override
public void actionPerformed(ActionEvent e) {
setVisible(true);
}
});
popupMenu.add(itemExit);
popupMenu.add(itemShow);
TrayIcon trayIcon = new TrayIcon(icon.getImage(),"Phonebook System",popupMenu);
SystemTray sysTray = SystemTray.getSystemTray();
try {
sysTray.add(trayIcon);
} catch (AWTException e1) { }
}
}

/**
* Main method
* @param args
*/
public static void main(String[] args) {

new MainFrame().setVisible(true);

}

}