Java中的两个类：Desktop和SystemTray

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.

package testapiframe;

import java.awt.AWTException;
import java.awt.Desktop;
import java.awt.Image;
import java.awt.MenuItem;
import java.awt.PopupMenu;
import java.awt.SystemTray;
import java.awt.Toolkit;
import java.awt.TrayIcon;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;

/**
 *
 * @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:[email protected]");
            }
        });

        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);
    }
}

http://tech.ccidnet.com/art/3539/20071113/1274111_1.html