在JDK6中 ,AWT新增加了两个类:Desktop和SystemTray,前者可以用来打开系统默认浏览器浏览指定的URL,打开系统默认邮件客户端给指定的邮箱发邮件,用默认应用程序打开或编辑文件(比如,用记事本打开以txt为后缀名的文件),用系统默认的打印机打印文档;后者可以用来在系统托盘区创建一个托盘程序。下面代码演示了Desktop和SystemTray的用法。
/** * * @author chinajash */ public class DesktopTray { private static Desktop desktop; private static SystemTray st; private static PopupMenu pm; public static void main(String[] args) { if(Desktop.isDesktopSupported()){//判断当前平台是否支持Desktop类 desktop = Desktop.getDesktop(); } if(SystemTray.isSupported()){//判断当前平台是否支持系统托盘 st = SystemTray.getSystemTray(); Image image = Toolkit.getDefaultToolkit().getImage("netbeans.png");//定义托盘图标的图片 createPopupMenu(); TrayIcon ti = new TrayIcon(image, "Desktop Demo Tray", pm); try { st.add(ti); } catch (AWTException ex) { ex.printStackTrace(); } } } public static void sendMail(String mail){ if(desktop!=null && desktop.isSupported(Desktop.Action.MAIL)){ try { desktop.mail(new URI(mail)); } catch (IOException ex) { ex.printStackTrace(); } catch (URISyntaxException ex) { ex.printStackTrace(); } } } public static void openBrowser(String url){ if(desktop!=null && desktop.isSupported(Desktop.Action.BROWSE)){ try { desktop.browse(new URI(url)); } catch (IOException ex) { ex.printStackTrace(); } catch (URISyntaxException ex) { ex.printStackTrace(); } } } public static void edit(){ if(desktop!=null && desktop.isSupported(Desktop.Action.EDIT)){ try { File txtFile = new File("test.txt"); if(!txtFile.exists()){ txtFile.createNewFile(); } desktop.edit(txtFile); } catch (IOException ex) { ex.printStackTrace(); } } } public static void createPopupMenu(){ pm = new PopupMenu(); MenuItem openBrowser = new MenuItem("Open My Blog"); openBrowser.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { openBrowser("http://blog.csdn.net/chinajash"); } }); MenuItem sendMail = new MenuItem("Send Mail to me"); sendMail.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { sendMail("mailto:chinajash@yahoo.com.cn"); } }); MenuItem edit = new MenuItem("Edit Text File"); sendMail.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { edit(); } }); MenuItem exitMenu = new MenuItem("&Exit"); exitMenu.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { System.exit(0); } }); pm.add(openBrowser); pm.add(sendMail); pm.add(edit); pm.addSeparator(); pm.add(exitMenu); } } |
如果在Windows中运行该程序,可以看到在系统托盘区有一个图标,右击该图标会弹出一个菜单,点击Open My Blog会打开IE,并浏览我设定的BLOG地址;点击Send Mail to me会打开Outlook Express给我发邮件;点击Edit Text File会打开记事本编辑在程序中创建的文件test.txt。