该代码实现了在系统右下角的任务栏中显示程序的图标，并且最小化程序后单击图标可以显示出来这个程序窗口
import java.awt.Color; import java.awt.Image; import java.awt.MenuItem; import java.awt.PopupMenu; import java.awt.Toolkit; import javax.swing.JFrame; import javax.swing.JLabel; public class test extends JFrame { long setTime = 30*1000; JLabel jl = new JLabel("剩余时间："); JLabel jl1 = new JLabel(); PopupMenu popupMenu1 = new PopupMenu(); MenuItem menuItem1 = new MenuItem(); public examTime(){ this.setLocation(200, 200); this.setSize(300, 200); isTray(); this.setVisible(true); addWindowListener(new WindowAdapter() { public void windowIconified(WindowEvent evt) { unVisible(); } }); popupMenu1.setLabel("PopupMenu"); menuItem1.setLabel("打开"); menuItem1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { showw(); } }); popupMenu1.add(menuItem1); } public void unVisible(){ this.setVisible(false); } public void showw(){ this.setVisible(true); } public void isTray() { try { if (SystemTray.isSupported()) {// 判断当前平台是否支持系统托盘 SystemTray st = SystemTray.getSystemTray(); Image image = Toolkit.getDefaultToolkit().getImage( "E:/eclipse/workspace/test/test.gif");//定义托盘图标的图片 TrayIcon ti = new TrayIcon( image); ti.setToolTip ( "test "); ti.setPopupMenu ( this.popupMenu1); st.add(ti); } } catch (Exception e) { } } public static void main(String[] args) { new test(); } }
