java_menu.rar_JAVA ME

//源文件名：aPopupMenu.java //在下载源程序中的文件夹：0620弹出式菜单 import java.applet.*; import java.awt.*; import java.awt.event.*; public class aPopupMenu extends Applet implements ActionListener, WindowListener,ItemListener,MouseListener { Frame f = new Frame("弹出式菜单的使用"); CheckboxMenuItem chm; PopupMenu pm; public void init() { f.setSize(400,180); f.setLocation(200,200); f.setBackground(Color.lightGray); f.addWindowListener(this); f.addMouseListener(this); f.setVisible(true); pm = new PopupMenu("Popup"); pm.add(new MenuItem("菜单项一")); chm=new CheckboxMenuItem("检测菜单项"); pm.add(chm); pm.add(new MenuItem("菜单项二")); pm.add(new MenuItem("菜单项三")); pm.addSeparator(); pm.add(new MenuItem("退出")); pm.addActionListener(this); chm.addItemListener(this); f.add(pm); } public void windowClosing(WindowEvent e) { f.setVisible(false); } public void windowOpened(WindowEvent e) { } public void windowIconified(WindowEvent e) { } public void windowDeiconified(WindowEvent e) { } public void windowClosed(WindowEvent e) { } public void windowActivated(WindowEvent e) { } public void windowLostFocus(WindowEvent e) { } public void windowStateChanged(WindowEvent e) { } public void windowDeactivated(WindowEvent e) { } public void actionPerformed(ActionEvent e) { if(e.getActionCommand()=="退出") f.setVisible(false); else f.setTitle("选择的是："+e.getActionCommand()); } public void mouseClicked(MouseEvent mec) { if (mec.getModifiers()==mec.BUTTON3_MASK) pm.show(f,mec.getX(),mec.getY()); } public void mousePressed(MouseEvent mep) { } public void mouseReleased(MouseEvent mer) { } public void mouseEntered(MouseEvent mee) { } public void mouseExited(MouseEvent mex) { } public void mouseDragged(MouseEvent med) { } public void itemStateChanged(ItemEvent e) { f.setTitle("选择的是："+(chm.getState()?"√":"")+chm.getLabel()); } }