4 课后答案【khdaw_lxywyl】(15)

file_exit=new MenuItem("退出"); file.add(file_new); file.add(file_open); file.add(file_save); file.addSeparator(); file.add(file_exit);

edit_copy=new MenuItem("复制",new MenuShortcut(KeyEvent.VK_C)); edit_pase=new MenuItem("粘贴",new MenuShortcut(KeyEvent.VK_V)); edit_cut=new MenuItem("剪切",new MenuShortcut(KeyEvent.VK_X)); edit_del=new MenuItem("删除",new MenuShortcut(KeyEvent.VK_DELETE)); edit.add(edit_copy); edit.add(edit_pase); edit.add(edit_cut); edit.add(edit_del);

help_about=new MenuItem("关于"); help.add(help_about);

txtAr=new TextArea(8,10); Panel p1=new Panel(); btn_copy=new Button("复制"); btn_cut=new Button("剪切"); btn_pase=new Button("粘贴"); btn_del=new Button("删除"); p1.setLayout(new FlowLayout(FlowLayout.LEFT));

p1.add(btn_copy);p1.add(btn_cut);p1.add(btn_pase);p1.add(btn_del); add("North",p1); add("Center",txtAr); validate();

file_new.addActionListener(this); file_open.addActionListener(this); file_save.addActionListener(this); file_exit.addActionListener(this); edit_copy.addActionListener(this); edit_pase.addActionListener(this); edit_cut.addActionListener(this); edit_del.addActionListener(this); help_about.addActionListener(this); btn_copy.addActionListener(this); btn_cut.addActionListener(this); btn_pase.addActionListener(this); btn_del.addActionListener(this);

15

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khd

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案

com