e644. handling action events.txt

这里面包含了一百多个JAVA源文件

Action events are fired by subclasses of AbstractButton and includes buttons, checkboxes, and menus. 
    AbstractButton button = new JButton("OK");
    button.addActionListener(new MyActionListener());
    
    public class MyActionListener implements ActionListener {
        public void actionPerformed(ActionEvent evt) {
            // Determine which abstract button fired the event.
            AbstractButton button = (AbstractButton)evt.getSource();
        }
    }