java - 在java代码中实现两个监听器时出错

Question

在我的代码中，我实现了两个监听器，如下所示:

     class Try extends JPanel  implements ActionListener, ListSelectionListener{

但编译时出现以下错误:

 EmailTrial.java:29: error: Try is not abstract and does not override abstract method actionPerformed(ActionEvent) in ActionListener
 class Try extends JPanel  implements ActionListener, ListSelectionListener{
 ^

请帮助解决问题以及如何消除此错误...

Answer 1

实现接口(interface)的类必须实现接口(interface)中声明的所有公共(public)方法。因此，您需要重写 ActionListener、ListSelectionListener 方法。

class Try extends JPanel  implements ActionListener, ListSelectionListener{

 @override
 public void actionPerformed(ActionEvent e){
   // Action event code
 }

 @override
 public void valueChanged(ListSelectionEvent e){
   // Action event code
 }
}