JAVA GUI AnonymousListener.java

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

public class AnonymousListener extends JFrame
{
int act = 0; //用來紀錄按鈕被按的次數
public static void main(String[] args)
{
AnonymousListener test = new AnonymousListener();
}
//用建構方法建立元件、將元件加入視窗、顯示視窗
public AnonymousListener()
{
setTitle("Listener 示範");
JButton mybutton = new JButton("換個標題");
//addActionListener() 的參數匿名類別物件
mybutton.addActionListener(
//以下建立的匿名類別物件為按鈕物件的傾聽者
new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
act++; //將按鈕次數加一
setTitle("發生"+ act+"次按鈕事件");
}
}
);
getContentPane().add(mybutton);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(420,140);
setVisible(true);
}
}