JDK6的新特性之一:Desktop类和SystemTray类

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.

/**
*
*@authorchinajash
*/
importjava.awt.Desktop;
importjava.awt.SystemTray;
importjava.awt.TrayIcon;
importjava.awt.Toolkit;
importjava.awt.Image;
importjava.awt.PopupMenu;
importjava.awt.Menu;
importjava.awt.MenuItem;
importjava.awt.AWTException;
importjava.io.File;
importjava.io.IOException;
importjava.net.URI;
importjava.net.URISyntaxException;
importjava.awt.event.ActionEvent;
importjava.awt.event.ActionListener;

publicclassDesktopTray{
privatestaticDesktopdesktop;
privatestaticSystemTrayst;
privatestaticPopupMenupm;
publicstaticvoidmain(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();
Imageimage=Toolkit.getDefaultToolkit().getImage("netbeans.png");//定义托盘图标的图片
createPopupMenu();
TrayIconti=newTrayIcon(image,"DesktopDemoTray",pm);
try{
st.add(ti);
}catch(AWTExceptionex){
ex.printStackTrace();
}
}
}

publicstaticvoidsendMail(Stringmail){
if(desktop!=null&&desktop.isSupported(Desktop.Action.MAIL)){
try{
desktop.mail(newURI(mail));
}catch(IOExceptionex){
ex.printStackTrace();
}catch(URISyntaxExceptionex){
ex.printStackTrace();
}
}
}

publicstaticvoidopenBrowser(Stringurl){
if(desktop!=null&&desktop.isSupported(Desktop.Action.BROWSE)){
try{
desktop.browse(newURI(url));
}catch(IOExceptionex){
ex.printStackTrace();
}catch(URISyntaxExceptionex){
ex.printStackTrace();
}
}
}

publicstaticvoidedit(){
if(desktop!=null&&desktop.isSupported(Desktop.Action.EDIT)){
try{
FiletxtFile=newFile("test.txt");
if(!txtFile.exists()){
txtFile.createNewFile();
}
desktop.edit(txtFile);
}catch(IOExceptionex){
ex.printStackTrace();
}
}
}

publicstaticvoidcreatePopupMenu(){
pm=newPopupMenu();
MenuItemopenBrowser=newMenuItem("OpenMyBlog");
openBrowser.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
openBrowser("http://blog.csdn.net/chinajash");
}
});

MenuItemsendMail=newMenuItem("SendMailtome");
sendMail.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
sendMail("mailto:[email protected]");
}
});

MenuItemedit=newMenuItem("EditTextFile");
sendMail.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
edit();
}
});

MenuItemexitMenu=newMenuItem("&Exit");
exitMenu.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
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OpenMyBlog会打开IE,并浏览"http://blog.csdn.net/chinajash";点击SendMailtome会打开OutlookExpress给我发邮件;点击EditTextFile会打开记事本编辑在程序中创建的文件test.txt