Here's an example. Look to see where you may be going wrong.
Get Image
Image image= ImageIO.read(getClass().getResource("/resources/stackoverflow1.png"));
- File structure
- Complete running program
Here
import java.awt.*;
import java.awt.event.*;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.UIManager;
public class HideToSystemTray extends JFrame {
TrayIcon trayIcon;
SystemTray tray;
HideToSystemTray() throws IOException {
super("SystemTray test");
System.out.println("creating instance");
try {
System.out.println("setting look and feel");
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
System.out.println("Unable to set LookAndFeel");
}
if (SystemTray.isSupported()) {
System.out.println("system tray supported");
tray = SystemTray.getSystemTray();
Image image = ImageIO.read(getClass().getResource("/resources/stackoverflow1.png"));
ActionListener exitListener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("Exiting....");
System.exit(0);
}
};
PopupMenu popup = new PopupMenu();
MenuItem defaultItem = new MenuItem("Exit");
defaultItem.addActionListener(exitListener);
popup.add(defaultItem);
defaultItem = new MenuItem("Open");
defaultItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
setVisible(true);
setExtendedState(JFrame.NORMAL);
}
});
popup.add(defaultItem);
trayIcon = new TrayIcon(image, "SystemTray Demo", popup);
trayIcon.setImageAutoSize(true);
} else {
System.out.println("system tray not supported");
}
addWindowStateListener(new WindowStateListener() {
public void windowStateChanged(WindowEvent e) {
if (e.getNewState() == ICONIFIED) {
try {
tray.add(trayIcon);
setVisible(false);
System.out.println("added to SystemTray");
} catch (AWTException ex) {
System.out.println("unable to add to tray");
}
}
if (e.getNewState() == 7) {
try {
tray.add(trayIcon);
setVisible(false);
System.out.println("added to SystemTray");
} catch (AWTException ex) {
System.out.println("unable to add to system tray");
}
}
if (e.getNewState() == MAXIMIZED_BOTH) {
tray.remove(trayIcon);
setVisible(true);
System.out.println("Tray icon removed");
}
if (e.getNewState() == NORMAL) {
tray.remove(trayIcon);
setVisible(true);
System.out.println("Tray icon removed");
}
}
});
setIconImage(ImageIO.read(getClass().getResource("/resources/stackoverflow1.png")));
setVisible(true);
setSize(300, 200);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args) throws IOException {
new HideToSystemTray();
}
}
- Result