系统托盘也就是桌面右下角的图标。。
此程序实现的功能是点击窗体关闭按钮不退出程序,而是隐藏到系统托盘里面。
实质上也只是把窗体不可见了。。。
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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.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.ImageIcon; import javax.swing.JFrame; public class TestTray extends JFrame { private static final long serialVersionUID = -7078030311369039390L; public TestTray() { this .setSize( 500 , 400 ); this .setLocationRelativeTo( null ); // 把窗体设置在屏幕中间 systemTray(); // 设置系统托盘 // 添加关闭按钮事件,关闭时候实质是把窗体隐藏 this .addWindowListener( new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { TestTray. this .setVisible( false ); } }); this .setVisible( true ); } /** * 处理系统托盘 */ private void systemTray() { if (SystemTray.isSupported()) { // 判断系统是否支持托盘功能. // 创建托盘右击弹出菜单 PopupMenu popupMenu = new PopupMenu(); //创建弹出菜单中的退出项 MenuItem itemExit = new MenuItem( "退出系统" ); itemExit.addActionListener( new ActionListener() { @Override public void actionPerformed(ActionEvent e) { System.exit( 0 ); } }); popupMenu.add(itemExit); //创建托盘图标 TrayIcon trayIcon = new TrayIcon(icon.getImage(), "测试系统托盘" , popupMenu); trayIcon.addActionListener( new ActionListener() { @Override public void actionPerformed(ActionEvent e) { TestTray. this .setVisible( true ); } }); //把托盘图标添加到系统托盘 //这个可以点击关闭之后再放到托盘里面,在此是打开程序直接显示托盘图标了 try { SystemTray.getSystemTray().add(trayIcon); } catch (AWTException e1) { e1.printStackTrace(); } } } public static void main(String[] args) { new TestTray(); } } |