abstractAction

abstractAction主要是可以统一定制，不需要像actionListener要一个一个去注册。

 

具体代码如下：

Jframe中一共3个地方用到了abstractAction:jmenuitem,jtoobar,jbutton

 

 

 package testAbstractClass;

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

 public class AbstractActionDemo1 extends JFrame {
     JTextArea theArea = null;
     ToolBarAction pushAction = null;

     public AbstractActionDemo1(){
         super("AbstractAction");
         theArea = new JTextArea();
         theArea.setEditable(true);
         this.getContentPane().add(new JScrollPane(theArea));


         pushAction = new ToolBarAction("按我",null);

         JMenuBar menuBar = buildJMenuBar();
         menuBar.setOpaque(true);
         JToolBar toolBar = buildJToolBar();
         this.getContentPane().add(toolBar,BorderLayout.NORTH);

         JButton jb=new JButton(pushAction);
         this.getContentPane().add(jb,BorderLayout.WEST);

         this.setJMenuBar(menuBar);
         this.setVisible(true);
         this.setBounds(new Rectangle(200,200,400,200));
         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     }

     public static void main(String...args){
         new AbstractActionDemo1();
     }

     public JMenuBar buildJMenuBar(){
         JMenu fileMenu = new JMenu("File");
         fileMenu.setMnemonic('F');
         fileMenu.add(pushAction);
         JMenuBar menuBar = new JMenuBar();
         menuBar.add(fileMenu);
         return menuBar;
     }

     public JToolBar buildJToolBar(){
         JToolBar toolBar = new JToolBar();
         toolBar.add(pushAction);
         toolBar.setFloatable(true);
         return toolBar;

     }

     class ToolBarAction extends AbstractAction{
         public ToolBarAction(String name,Icon icon){
             super(name,icon);
         }
         @Override
         public void actionPerformed(ActionEvent e){
             theArea.append("這是Action的好處\n");
         }
     }
 }