【上机作业】【java】2010.5.11 菜单栏的应用
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class MenuExam extends JFrame implements ActionListener
{ JMenuBar bar1;
JMenu m_file,m_edit,m_format, m_view,m_help;
JMenuItem m_new,m_open,m_save,m_save_as,m_option,m_print,m_exit,m_cut,m_copy,m_paste,m_auto,m_font,m_state,m_help_theme,m_about;
public MenuExam()
{super(“学生管理系统”);
//生成菜单条
bar1=new JMenuBar();
//生成菜单
m_file=new JMenu(“文件”);
m_edit=new JMenu(“编辑”);
m_format=new JMenu(“格式”);
m_view=new JMenu(“查看”);
m_help=new JMenu(“帮助”);
//生成菜单项
m_new=new JMenuItem(“新建”);
m_new.setAccelerator(KeyStroke.getKeyStroke(‘N’, java.awt.Event.CTRL_MASK, false));
m_open=new JMenuItem(“打开”);
m_open.setAccelerator(KeyStroke.getKeyStroke(‘O’, java.awt.Event.CTRL_MASK, false));
//打开菜单项加入事件处理程序
m_open.addActionListener(this);
m_save=new JMenuItem(“保存”);
m_save.setAccelerator(KeyStroke.getKeyStroke(‘S’, java.awt.Event.CTRL_MASK, false));
m_save_as=new JMenuItem(“另存为”);
m_option=new JMenuItem(“页面设置”);
m_print=new JMenuItem(“打印”);
m_print.setAccelerator(KeyStroke.getKeyStroke(‘P’, java.awt.Event.CTRL_MASK, false));
m_file.addSeparator();
m_exit=new JMenuItem(“退出”);
m_cut=new JMenuItem(“剪切”);
m_copy=new JMenuItem(“复制”);
m_paste=new JMenuItem(“粘贴”);
m_auto=new JMenuItem(“自动换行”);
m_auto.setMnemonic(KeyEvent.VK_W);
m_font=new JMenuItem(“字体”);
m_state=new JMenuItem(“状态栏”);
m_help_theme=new JMenuItem(“帮助主题”);
m_about=new JMenuItem(“关于记事本”);
//将菜单项加入到相应的菜单中
m_file.add(m_new);
m_file.add(m_open);
m_file.add(m_save);
m_file.add(m_save_as);
m_file.addSeparator();
m_file.add(m_option);
m_file.add(m_print);
m_file.addSeparator();
m_file.add(m_exit);
m_edit.add(m_cut);
m_edit.add(m_copy);
m_edit.add(m_paste);
m_format.add(m_auto);
m_format.add(m_font);
m_view.add(m_state);
m_help.add(m_help_theme);
m_help.addSeparator();
m_help.add(m_about);
//菜单加入到菜单条
bar1.add(m_file);
bar1.add(m_edit);
bar1.add(m_format);
bar1.add(m_view);
bar1.add(m_help);
//整个菜单加入窗体上
this.setJMenuBar(bar1);
//设置窗体大小
this.setSize(800,600);
//设置窗体可见
this.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{//判断事件源
if(e.getSource().equals(m_open))
{//执行打开操作
JFileChooser jf=new JFileChooser();
jf.showOpenDialog(null);
}
}
public static void main(String args[])
{
new MenuExam();
}
}
