menutest.java

Java程序设计技巧与开发实例附书源代码。

import java.awt.*;
import java.awt.event.*;

public class MenuTest
    extends Frame
    implements ActionListener {
  private MenuItem fileNew = new MenuItem("New");
  private MenuItem fileOpen = new MenuItem("Open");
  private MenuItem fileExit = new MenuItem("Exit");
  private MenuItem editCut = new MenuItem("Cut");
  private MenuItem editCopy = new MenuItem("Copy");
  private MenuItem editPaste = new MenuItem("Paste");
  public MenuTest() {
    super("Menu Test Program");
    Menu file = new Menu("File");
    file.add(fileNew);
    fileNew.setEnabled(false);
    file.add(fileOpen);
    fileOpen.setEnabled(false);
    file.addSeparator();
    file.add(fileExit);
    fileExit.setEnabled(true);
    Menu edit = new Menu("Edit");
    edit.add(editCut);
    editCut.setEnabled(false);
    edit.add(editCopy);
    editCopy.setEnabled(false);
    edit.add(editPaste);
    editPaste.setEnabled(false);
    MenuBar bar = new MenuBar();
    bar.add(file);
    bar.add(edit);
    setMenuBar(bar);
    fileExit.addActionListener(this);
    setSize(100, 100);
    show();
  }

  public void actionPerformed(ActionEvent e) {
    if (e.getSource() == fileExit) {
      ConfirmDialog exit = new ConfirmDialog(this, "Confirm Exit",
                                             "真的要退出吗？");
      if (exit.isOkay) {
        System.exit(0);
      }
    }

  }

  public static void main(String args[]) {
    MenuTest f = new MenuTest();
  }
}