mymenu.java

Menu菜单的演示例子

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

public class MYMENU extends JFrame 
{
	private JFrame frame;
	private JMenuBar menubar;
    private JMenu filemenu;
    private JMenu editmenu;
    private JMenu helpmenu;
    private JMenu Searchmenu;
    private JMenu Viewmenu;
    private JMenu windowmenu;
    private JMenu colormenu;
    private JMenu fontmenu;
    private JMenuItem exititem;
    private JMenuItem aboutitem;
            
    private  Color colorValues[] = 
      { Color.black, Color.blue, Color.red, Color.green};   
    private JRadioButtonMenuItem colorItems[];
    private JRadioButtonMenuItem fonts[];
    private JCheckBoxMenuItem styleItems[];
    private JLabel displayLabel;
    private ButtonGroup fontGroup, colorGroup;
    private int style;
    
   public MYMENU()
   
   {
   	 super( "MY FIRST MENU" );
   	  	   	
   }
               
    public void fix()
    {   
    
        JFrame frame = new JFrame("My First Menu");
        JMenuBar menubar = new JMenuBar();
    	JMenu filemenu = new JMenu("File");
    	JMenu editmenu = new JMenu("Edit");
    	JMenu searchmenu = new JMenu("Search");
    	JMenu viewmenu = new JMenu("View");
    	JMenu windowmenu = new JMenu("Window");
    	JMenu helpmenu = new JMenu("Help");
    	JMenu colormenu = new JMenu( "Color" );
        colormenu.setMnemonic( 'C' );
    	JMenu fontmenu = new JMenu("Font");
    	fontmenu.setMnemonic('O');
    	
    	JMenuItem aboutitem = new JMenuItem("about");
    	JMenuItem exititem = new JMenuItem("exit");
    //	JRadioButtonMenuItem  colorItems = new JRadioButtonMenuItem("color");
    //	JRadioButtonMenuItem  fontitem = new JRadioButtonMenuItem("font");   	
       	
    	filemenu.add(exititem);
    	exititem.setMnemonic( 'E' );
    	
    	filemenu.add(aboutitem);
    	aboutitem.setMnemonic('A');
      	    	
    	setJMenuBar( menubar ); 
    	menubar.add(filemenu);
    	filemenu.setMnemonic('F');
    	
      	menubar.add(editmenu);
    	editmenu.setMnemonic('D');
    	
    	menubar.add(searchmenu);
    	searchmenu.setMnemonic('S');
    	
    	menubar.add(viewmenu);
        viewmenu.setMnemonic('V');
    
    	menubar.add(windowmenu);
        windowmenu.setMnemonic('W');   
   
   // 	setJMenuBar( menubar ); 
    	menubar.add(helpmenu);
    	helpmenu.setMnemonic('H');
    	
    //对exititem 绑定事件      
        exititem.addActionListener(

         new ActionListener() {  // anonymous inner class

            // terminate application when user clicks exitItem
            public void actionPerformed( ActionEvent event )
            {
               System.exit( 0 );
            }

         });  // end anonymous inner class

       
      
        aboutitem.addActionListener(
        	
        	new ActionListener() 
        	{
        		public void actionPerformed( ActionEvent event )
        		{
        		
        			JOptionPane.showMessageDialog( MYMENU.this,
                  "Thank you for Click",
                   "About", JOptionPane.PLAIN_MESSAGE );
        			
        		}
        		
        	});  
        	
     { 
        // 建立Color的Sub menu
                    
      String colors[] = { "Black", "Blue", "Red", "Green" };
      colorItems = new JRadioButtonMenuItem[ colors.length ];
      colorGroup = new ButtonGroup();
      ItemHandler itemHandler = new ItemHandler();

      // create color radio button menu items
      for ( int count = 0; count < colors.length; count++ ) {
         colorItems[ count ] = 
            new JRadioButtonMenuItem( colors[ count ] );
         colormenu.add( colorItems[ count ] );
         colorGroup.add( colorItems[ count ] );
         colorItems[ count ].addActionListener( itemHandler );
      }

      // select first Color menu item
      colorItems[ 0 ].setSelected( true );  

//       add format menu to menu bar
      editmenu.add( colormenu );
      editmenu.addSeparator();	
        	
        	
      }  	
        	
      {
      	//建立font的 sub menu           
      String fontNames[] = { "Serif", "Monospaced", "SansSerif" };

     // JMenu fontmenu = new JMenu( "Font" );
      fontmenu.setMnemonic( 'N' );

      fonts = new JRadioButtonMenuItem[ fontNames.length ];
      fontGroup = new ButtonGroup();

      for ( int count = 0; count < fonts.length; count++ )
       {                  
         fonts[ count ] = new JRadioButtonMenuItem( fontNames[ count ] );
         fontmenu.add( fonts[ count ] );
         fontGroup.add( fonts[ count ] );
       //fonts[ count ].addActionListener(itemHandler);
       }

      fonts[ 0 ].setSelected( true );
      fontmenu.addSeparator();

      // set up style menu items
      String styleNames[] = { "Bold", "Italic" };
      styleItems = new JCheckBoxMenuItem[ styleNames.length ];
      StyleHandler styleHandler = new StyleHandler();

      // create style checkbox menu items
      for ( int count = 0; count < styleNames.length; count++ ) {
         styleItems[ count ] = 
            new JCheckBoxMenuItem( styleNames[ count ] );
         fontmenu.add( styleItems[ count ] );
         styleItems[ count ].addItemListener( styleHandler );
      }

      // put Font menu in Format menu
      editmenu.add( fontmenu );

      // add Format menu to menu bar
      menubar.add( editmenu );  
     
      
      }  	
               	
        
        {
        	
        displayLabel = new JLabel( "** Hello.....* :)*", SwingConstants.CENTER );
        displayLabel.setForeground( Color.RED );
        displayLabel.setFont( new Font( "Serif", Font.PLAIN, 95 ) );

        getContentPane().setBackground( Color.pink);
        getContentPane().add( displayLabel, BorderLayout.CENTER );

        setSize( 800, 375 );
        setVisible( true );
        	
        }	
           	 
    
        }

        public void b()
      
       {         
        	frame.addWindowListener(new WindowAdapter() {
				public void windowClosing(WindowEvent e) {
					System.exit(0);				 		
				}
			});
    	
       }
    

    
    
    
    // inner class to handle action events from menu items
   private class ItemHandler implements ActionListener
    {

      // process color and font selections
      	public void actionPerformed( ActionEvent event )
      	{
         // process color selection
         	for ( int count = 0; count < colorItems.length; count++ )
  
            	if ( colorItems[ count ].isSelected() ) {
               displayLabel.setForeground( colorValues[ count ] );
               break;
            	}
 
         // process font selection
         	for ( int count = 0; count < fonts.length; count++ )

            	if ( event.getSource() == fonts[ count ] ) 
            	{
            		 displayLabel.setFont( 
                 	 new Font( fonts[ count ].getText(), style, 72 ) );
               	break;
           	 	}

         repaint();  

      	} 

   	} 

   // inner class to handle item events from check box menu items
      private class StyleHandler implements ItemListener {

      // process font style selections
      public void itemStateChanged( ItemEvent e )
      {
         style = 0;

         // check for bold selection
         if ( styleItems[ 0 ].isSelected() )
            style += Font.BOLD;

         // check for italic selection
         if ( styleItems[ 1 ].isSelected() )
            style += Font.ITALIC;

         displayLabel.setFont( 
            new Font( displayLabel.getFont().getName(), style, 250) );

         repaint();
      }

   }                   // end class StyleHandler

    
        
    public static void main(String[] args)
    {
    	MYMENU aa =new MYMENU();
    	aa.fix();
    	aa.b();
    	
    }
       
    
}