j_menu.java.bak

一个十分好的java基础学习的课件

// ////////////////////////////////////////////////////////
// 
// J_Menu.java
// 
// Created by Jun-Hai Yong,    on XX xx, xxxx (Date)
// ////////////////////////////////////////////////////////
// Readme:
//      Menu Example.
// ////////////////////////////////////////////////////////
// Using this example, please explicitly refer to the book:
//     Jun-Hai Yong. Programming in Java. 
//     Beijing: Tsinghua University Press, 2004.
// 使用本例子，请注明引用:
//     雍俊海. Java 程序设计. 北京: 清华大学出版社, 2004.
// Please note that the author and publisher make no 
// warranty of any kind on the examples provided.
// ////////////////////////////////////////////////////////

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class J_Menu extends JFrame
{
    JMenuBar m_menuBar= new JMenuBar( );

    public J_Menu( )
    {
        super("Menu Example");
        JMenu [] m = { new JMenu("File"), new JMenu("Edit") };
        char [] mC = { 'F', 'E' };
        JMenuItem [] [] mI =
        {
            {new JMenuItem("Save"), new JMenuItem("Print")},
            {new JMenuItem("Copy"), new JMenuItem("Read")}
        };
        char [] [] mIC = { {'S', 'P'}, {'C', 'R'}};
        int i, j;
        
        setJMenuBar(m_menuBar);
        for (i= 0; i< m.length; i++)
        {
            m_menuBar.add(m[i]);
            m[i].setMnemonic(mC[i]);
            for (j= 0; j< mI[i].length; j++)
            {
                m[i].add(mI[i][j]);
                mI[i][j].setMnemonic(mIC[i][j]);
                mI[i][j].addActionListener( new ActionListener( )
                    {
                        public void actionPerformed(ActionEvent e)
                        {
                            JMenuItem mItem= (JMenuItem)e.getSource( );
                            System.out.println("Run Menu Item: " + mItem.getText( ));
                        } // End of method: actionPerformed
                    } // End of the anonymous inner class, which implements ActionListener
                ); // End of invoking addActionListener
            } // End of inner loop: inner for
        } // End of inner loop: outer for
        
        setSize(250, 120);
        setVisible(true);
    } // End of constructor: J_Menu

    public static void main( String args[] )
    { 
        JFrame app = new J_Menu( );

        Container cp = app.getContentPane( );
        app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
    } // End of method: main

} // End of class: J_Menu