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这里有个例子，你换成自己的图片试试就明白了

public class TestTray extends JFrame {

TrayIcon trayIcon = null;

public TestTray() {

try {

trayIcon = new TrayIcon(ImageIO.read(getClass().getResource("snow.png")));

} catch (IOException e2) {

e2.printStackTrace();

}

trayIcon.setImageAutoSize(true);

trayIcon.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

SystemTray.getSystemTray().remove(trayIcon);

setVisible(true);

int state = getExtendedState();

if ((state & JFrame.ICONIFIED) == JFrame.ICONIFIED) {

state = state - JFrame.ICONIFIED;

setExtendedState(state);

}

}

});

addWindowListener(new WindowAdapter() {

@Override

public void windowIconified(WindowEvent e) {

try {

SystemTray.getSystemTray().add(trayIcon);

} catch (AWTException e1) {

e1.printStackTrace();

}

setVisible(false);

}

});

setDefaultCloseOperation(EXIT_ON_CLOSE);

setSize(400, 300);

setLocationRelativeTo(null);

setVisible(true);

}

public static void main(String[] args) {

new TestTray();

}

}