JMenuBar, JMenu, JMenuItemおよびAbstractActionの使い方

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MyMenuBar.java
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package ProcessDesigner;

import java.util.*;

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

/**
* $Id: ProcessDesigner.html,v 1.1 2009/06/22 16:11:52 kishi Exp kishi $
*/

public class MyMenuBar extends JMenuBar {

    public MyMenuBar() {
        super();

        JMenu menu1 = new JMenu( "メニュー１" );
        JMenu menu2 = new JMenu( "メニュー２" );

        Action action = new MyMenuBarAction();

        addMenuItem( menu1, action, "新規作成", "CREATE" );
        addMenuItem( menu1, action, "終了", "EXIT" );

        /** ベタに書くとこうなる
        JMenuItem create = new JMenuItem("新規作成");
                       menu1.add(create);
                       create.setActionCommand("CREATE");
                       create.addActionListener(action);

        JMenuItem exit = new JMenuItem("終了");
                       exit.setActionCommand("EXIT");
                       exit.addActionListener(action);
                       menu1.add(exit);
        */


        addMenuItem( menu2, action, "機能１", "A" );
        addMenuItem( menu2, action, "機能２", "B" );
        addMenuItem( menu2, action, "機能３", "C" );
        addMenuItem( menu2, action, "機能４", "D" );
        addMenuItem( menu2, action, "機能５", "E" );

        this.add( menu1 );
        this.add( menu2 );

    }

    private void addMenuItem( JMenu menu, Action action, String description, String commandName ) {
        JMenuItem item = new JMenuItem( description );
        menu.add( item );
        item.setActionCommand( commandName );
        item.addActionListener( action );

    }

}


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MyMenuBarAction.java
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package ProcessDesigner;

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

/**
* $Id: ProcessDesigner.html,v 1.1 2009/06/22 16:11:52 kishi Exp kishi $
*/

public class MyMenuBarAction extends AbstractAction {
    public MyMenuBarAction() {
        super();
    }

    public void actionPerformed( ActionEvent event ) {
        String eventname = event.getActionCommand();

        // 実行されたコマンドをダンプします
        System.out.println( eventname );

        if ( eventname.equals( "EXIT" ) ) {
            System.exit( 0 );
        }
    }
}

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ProcessDesigner.java
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package ProcessDesigner;

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

/**
* $Id: ProcessDesigner.html,v 1.1 2009/06/22 16:11:52 kishi Exp kishi $
*/

public class ProcessDesigner extends JFrame {
    private static final String REAL_AUTHOR = "岸　康弘";

    public ProcessDesigner() {

        // メニュー
        MyMenuBar menuBar = new MyMenuBar();

        //-----------------------------------------------------
        // 全ての部品をContainerに配置する
        //-----------------------------------------------------
        Container content = this.getContentPane();

        content.add( menuBar, BorderLayout.NORTH );
        content.add( new JPanel(), BorderLayout.CENTER );
        content.add( new JPanel(), BorderLayout.EAST );
        content.add( new JPanel(), BorderLayout.SOUTH );
    }

    public static void main( String[] args ) {

        ProcessDesigner designer = new ProcessDesigner();

        /* 終了処理 */
        designer.addWindowListener( new WindowAdapter() {
                                        public void windowClosing( WindowEvent e ) {
                                            System.exit( 0 );
                                        }
                                    }
                                  );

        designer.setBounds( 0, 0, 600, 800 );

        // タイトルの表示
        designer.setTitle( "Process Designer DEMO" );

        designer.setVisible( true );
        designer.pack();
    }

}

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