AbstractAction举例
abstractAction主要是可以统一定制，不需要像actionListener要一个一个去注册。
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具体代码如下：
Jframe中一共3个地方用到了abstractAction:jmenuitem,jtoobar,jbutton
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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"); } } }