这几个是桌面开发常用到的。
      Desktop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.
//Desktop的使用 import java.awt.Desktop; import java.net.URI; public class DesktopTest { public static void main(String[] args) { if (!Desktop.isDesktopSupported()) { System.err.println("Desktop not supported!"); System.exit(-1); } Desktop desktop = Desktop.getDesktop(); try { desktop.browse(new URI("http://www.baidu.com/")); } catch (Exception ioe) { System.out.println(ioe); } } }
SystemTray可以用来在系统托盘区创建一个托盘程序
//SystemTray的使用 import java.awt.*; import java.awt.event.*; import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; import javax.swing.JFrame; public class SystemTrayTest extends JFrame { private static final long serialVersionUID = 1L; private TrayIcon trayIcon;// 托盘图标 private SystemTray systemTray;// 系统托盘 public SystemTrayTest() { super("系统托盘图标"); systemTray = SystemTray.getSystemTray();// 获得系统托盘的实例 setSize(150, 150); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setLocationRelativeTo(null); this.setVisible(true); try { trayIcon = new TrayIcon(ImageIO.read(new File("SystemTray.png"))); systemTray.add(trayIcon);// 设置托盘的图标 } catch (IOException e1) { e1.printStackTrace(); } catch (AWTException e2) { e2.printStackTrace(); } this.addWindowListener(new WindowAdapter() { public void windowIconified(WindowEvent e) { dispose();// 窗口最小化时dispose该窗口 } }); trayIcon.addMouseListener(new MouseAdapter() { public void mouseClicked(MouseEvent e) { if (e.getClickCount() == 2)// 双击托盘窗口再现 setExtendedState(Frame.NORMAL); setVisible(true); } }); } public static void main(String args[]) { new SystemTrayTest(); } }

JTable的排序和过滤
//TableRowSorter的使用 import java.awt.*; import java.awt.event.ActionListener; import java.util.Comparator; import javax.swing.*; import javax.swing.table.*; public class TableRowSorterTest { public static void main(String[] args) { Object[][] data = new Object[][] { { 49, "a", "表" }, { 24, "b", "格" }, { 9, "c", "排" }, { 5, "d", "序" } }; // 数据 String[] title = new String[] { "标题一", "标题二", "标题三" };// 标题 DefaultTableModel model = new DefaultTableModel(data, title); final TableRowSorter<DefaultTableModel> sorter = new TableRowSorter<DefaultTableModel>( model);// 设置排序 final JTextField field = new JTextField(20);// 查找输入框 final JComboBox list = new JComboBox(title);// 列表 JButton button = new JButton("查找");// 按钮 JTable table = new JTable(model); table.setRowSorter(sorter);// 为table设置排序器 sorter.setComparator(0, new Comparator<Object>() {//为第一行设置排序器 public int compare(Object arg0, Object arg1) { try{ int a = Integer.parseInt(arg0.toString()); int b = Integer.parseInt(arg1.toString()); return a-b; }catch(NumberFormatException e){ return 0; } }//构造一个为数字排序的Comparator }); button.addActionListener(new ActionListener() { public void actionPerformed(java.awt.event.ActionEvent e) { int index = list.getSelectedIndex(); sorter.setRowFilter(RowFilter.regexFilter(field.getText(), index));// 按指定列过滤 } }); // 以下为布局 JFrame frame = new JFrame("表格排序"); JPanel contentPanel = new JPanel(new BorderLayout()); JPanel searchPanel = new JPanel(); searchPanel.add(list); searchPanel.add(field); searchPanel.add(button); contentPanel.add(searchPanel, BorderLayout.NORTH); contentPanel.add(new JScrollPane(table), BorderLayout.CENTER); frame.getContentPane().add(contentPanel); frame.pack(); frame.setLocationRelativeTo(null); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } }