java 菜单，右键弹出菜单，工具条的样例

package popmenudemo; import javax.swing.*; import java.awt.*; import java.awt.event.*; import javax.swing.event.*; import javax.swing.border.*; import java.util.*; public class PopMenuDemo extends JFrame { JTextArea theArea = null; static final String ComboStr[] = { "Times New Roman", "Dialog", "宋体", "黑体", "楷体" }; JPopupMenu Popup = null;// 声明一个全局(Global)并设置初始值为null的JPopupMenu组件. public PopMenuDemo() { super("JPopupMenu1"); theArea = new JTextArea(); theArea.setEditable(false); this.getContentPane() .add(new JScrollPane(theArea), BorderLayout.CENTER); JMenuBar MBar = new JMenuBar(); MBar.setOpaque(true); JMenu mfile = buildFileMenu(); JToolBar theBar = buildToolBar(); this.getContentPane().add(theBar, BorderLayout.NORTH); PopupPanel pp = new PopupPanel();// new一个PopupPanel组件来放置JPopupMenu. this.getContentPane().add(pp, BorderLayout.SOUTH); // 将PopupPanel组件放置到窗口中. MBar.add(mfile); setJMenuBar(MBar); }// end of JPopupMenu1() /*****************begin********************** * 分别建立程序中菜单,工具栏和事件处理模式的部份,我们在此不再加以说明. ****************************************/ public JMenu buildFileMenu() { JMenu thefile = new JMenu("File"); thefile.setMnemonic('F'); JMenuItem newf = new JMenuItem("New", new ImageIcon("icons/new.png")); JMenuItem open = new JMenuItem("Open", new ImageIcon("icons/open.png")); JMenuItem close = new JMenuItem("Close", new ImageIcon( "icons/close.png")); JMenuItem quit = new JMenuItem("Exit", new ImageIcon("icons/exit.png")); newf.setMnemonic('N'); open.setMnemonic('O'); close.setMnemonic('L'); quit.setMnemonic('X'); newf.setAccelerator(KeyStroke.getKeyStroke('N', java.awt.Event.CTRL_MASK, false)); open.setAccelerator(KeyStroke.getKeyStroke('O', java.awt.Event.CTRL_MASK, false)); close.setAccelerator(KeyStroke.getKeyStroke('L', java.awt.Event.CTRL_MASK, false)); quit.setAccelerator(KeyStroke.getKeyStroke('X', java.awt.Event.CTRL_MASK, false)); newf.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { theArea.append("- MenuItem New Performed -\n"); } }); open.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { theArea.append("- MenuItem Open Performed -\n"); } }); close.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { theArea.append("- MenuItem Close Performed -\n"); } }); quit.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { System.exit(0); } }); thefile.add(newf); thefile.add(open); thefile.add(close); thefile.addSeparator(); thefile.add(quit); return thefile; }// end of buildFileMenu() public JToolBar buildToolBar() { JToolBar toolBar = new JToolBar(); toolBar.setFloatable(true); ToolBarAction tba_new = new ToolBarAction("new",new ImageIcon("icons/new.png")); ToolBarAction tba_open = new ToolBarAction("open",new ImageIcon("icons/open.png")); ToolBarAction tba_close = new ToolBarAction("close",new ImageIcon("icons/close.png")); JButton JB; JB = toolBar.add(tba_new); JB.setActionCommand("#TooBar_NEW performed!"); JB.setToolTipText((String)tba_new.getValue(Action.NAME)); JB = toolBar.add(tba_open); JB.setActionCommand("#ToolBar_OPEN performed!"); JB.setToolTipText((String)tba_open.getValue(Action.NAME)); JB = toolBar.add(tba_close); JB.setActionCommand("#ToolBar_CLOSE performed!"); JB.setToolTipText((String)tba_close.getValue(Action.NAME)); toolBar.addSeparator(); ToolBarAction tba_B = new ToolBarAction("bold",new ImageIcon("icons/bold.png")); ToolBarAction tba_I = new ToolBarAction("italic",new ImageIcon("icons/italic.png")); ToolBarAction tba_U = new ToolBarAction("underline",new ImageIcon("icons/underline.png")); JB = toolBar.add(tba_B); JB.setActionCommand("#ToolBar_Bold performed!"); JB.setToolTipText((String)tba_B.getValue(Action.NAME)); JB = toolBar.add(tba_I); JB.setActionCommand("#ToolBar_Italic performed!"); JB.setToolTipText((String)tba_I.getValue(Action.NAME)); JB = toolBar.add(tba_U); JB.setActionCommand("#ToolBar_Underline performed!"); JB.setToolTipText((String)tba_U.getValue(Action.NAME)); toolBar.addSeparator(); JLabel JLfont = new JLabel("Font Type"); toolBar.add(JLfont); toolBar.addSeparator(); JComboBox jcb = new JComboBox(ComboStr); jcb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { theArea.append("*Combobox "+((JComboBox)e.getSource()).getSelectedItem()+" performed!\n"); }}); toolBar.add(jcb); return toolBar; }//end of buildToolBar() /***************** * End********************** 分别建立程序中菜单,工具栏和事件处理模式的部份,我们在此不再加以说明. ****************************************/ public static void main(String[] args) { SwingUtil.setLookAndFeel(); JFrame F = new PopMenuDemo(); F.setSize(430, 200); F.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } });// end of addWindowListener F.setVisible(true); } // end of main class ToolBarAction extends AbstractAction { public ToolBarAction(String name, Icon icon) { super(name, icon); } public void actionPerformed(ActionEvent e) { try { theArea.append(e.getActionCommand() + "\n"); } catch (Exception ex) { } } }// end of inner class ToolBarAction /* * 本方法建立inner class * PopupPanel.这个类继承JPanel并实作MouseListener,PopupMenuListener,ActionListener和 * ActionListener等3个Listener * .MouseListener为处理鼠标事件的Listener,PopupMenuListener为Popup菜单事件的Listener, * ActionListener则是大家最熟悉用来处理JMenuItem事件的Listener. */ class PopupPanel extends JPanel implements MouseListener, PopupMenuListener, ActionListener { public PopupPanel() { Popup = new JPopupMenu();// new 一个新的JPopupMenu. JMenuItem theItem; // 分别建立四个JMenuItem和其事件处理模式将将JMenuItem加入JPopupMenu中. Popup.add(theItem = new JMenuItem("Cut", new ImageIcon( "icons/cut.png")));// 建立JMenuItem组件. theItem.addActionListener(this);// 将JMenuItem组件加入事件处理模式. Popup.add(theItem = new JMenuItem("Copy", new ImageIcon( "icons/copy.png"))); theItem.addActionListener(this); Popup.add(theItem = new JMenuItem("Paste", new ImageIcon( "icons/paste.png"))); theItem.addActionListener(this); Popup.addSeparator();// 在JPopupMenu中加入分隔线,我们在前面有提到JPopupMenu和Menu大致上的性质是一样的,所以 // 在JPopupMenu中一样是以JMenuItem来当作选项的组件. Popup.add(theItem = new JMenuItem("Page Setup...")); theItem.addActionListener(this); // 利用setBorder()方法将BevelBorder类当作参数传入,使JPopupMenu产生立体边框浮起的效果.我们也可以将参数设置改 // 为BevelBorder.LOWERED使得JPopupMenu产生立体边框凹陷的效果. Popup.setBorder(new BevelBorder(BevelBorder.RAISED)); Popup.addPopupMenuListener(this); // 将JPopupMenu组件加入PopupMenu事件处理模式中. addMouseListener(this);// 将PopupPanel类加入Mouse事件处理模式中. theArea.addMouseListener(this);// 后面有说明 }// end of PopupPanel() /* * 由于PopupPanel这个inner * class中实作了MouseListener,因此需要覆写mouseClicked(),mousePressed(), * mouseReleased * (),mouseEntered()和mouseExited()等5个方法.在这个范例里当mouseClicked( * ),mousePressed() * 和mouseReleased()等3个方法被触发时会调用checkPopup()方法来�