WindowListener(附带适配器改良方案)

来源:互联网 发布:阿里云流量收费标准 编辑:程序博客网 时间:2024/04/30 01:01

 记忆力再次被折磨,求IDE助攻!  ps:顺便复习六级单词。。。


源代码:

import java.awt.event.WindowListener ;import java.awt.event.WindowEvent ;import java.awt.Color ;import javax.swing.JFrame ;class MyWindowEventHandle implements WindowListener{    public void windowActivated(WindowEvent e)    {        System.out.println("windowActivated---->窗口被选中") ;    }       public void windowClosed(WindowEvent e)    {       System.out.println("windowClosed---->窗口被关闭") ;    }       public void windowClosing(WindowEvent e)    {       System.out.println("windowClosing---->窗口关闭") ;    }       public void windowDeactivated(WindowEvent e)    {       System.out.println("windowDeactivated---->取消窗口选中") ;    }       public void windowDeiconified(WindowEvent e)    {       System.out.println("windowDeiconified---->窗口从最小化恢复") ;    }       public void windowIconified(WindowEvent e)    {        System.out.println("windowIconfied---->窗口最小化") ;    }       public void windowOpened(WindowEvent e)    {        System.out.println("WindowOpened---->窗口打开") ;    }   } ;class Tester{   public static void main(String args[])   {       JFrame frame = new JFrame("窗口监听") ;       frame.addWindowListener(new MyWindowEventHandle()) ;       frame.setSize(500,500) ;       frame.setBackground(Color.orange) ;       frame.setLocation(400,400) ;       frame.setVisible(true) ;   }}

这样写显然太过冗余,下面介绍窗口监听适配器:如果只需要监听窗口关闭这一个动作,使用接口会造成代码过于冗余,因为要覆写WindowListener各个方法,这里就引出WindowAdapter设计模式,当然可以直接匿名内部类省去创建监听类的麻烦。直接上代码:这样就可以想监听什么就写什么,不需要写一堆冗余代码大笑

import java.awt.event.WindowListener ;import java.awt.event.WindowEvent ;import java.awt.event.WindowAdapter ;  //适配器设计模式import java.awt.Color ;import javax.swing.JFrame ;class Tester{   public static void main(String args[])   {      JFrame frame = new JFrame("匿名内部类") ;      frame.addWindowListener(new WindowAdapter()      {         public void windowClosing(WindowEvent e)         {            System.out.println("窗口关闭") ;            System.exit(1) ;         }      } ) ;  //匿名内部类配合适配器      frame.setSize(400,400) ;      frame.setLocation(400,400) ;      frame.setVisible(true) ;   }}



0 0
原创粉丝点击