Question

编写一个程序，其功能为：在窗口上放一个按钮，当不断单击按钮时显示它被单击的次数。

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class ClicksNumber extends JFrame{
private JButton button=new JButton("请点击");
Container container=this.getContentPane();
public ClicksNumber(){
this.setTitle("欢迎使用");
container.setLayout(new FlowLayout());
button.addActionListener(new ButtonEventHandle());
container.add(button);
this.show();
this.setSize(300,400);
}
class ButtonEventHandle implements ActionListener{
public void actionPerform(ActionEvent e){
int count=0; count++;count=count++;
System.out.println("按钮被点击了"+count+"次");
}

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub

}

}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
new ClicksNumber();
}

}帮我看下这个错误在哪吧

Answer 1

事件写的有问题，我一修改，你自己看一下吧
package TEST;

import javax.swing.*;

import java.awt.*;
import java.awt.event.*;

public class ClicksNumber extends JFrame{

private JButton button=new JButton("请点击");
Container container=this.getContentPane();
private static int i = 0;

public ClicksNumber(){

this.setTitle("欢迎使用");
container.setLayout(new FlowLayout());
button.addActionListener(new ButtonEventHandle());
container.add(button);
this.show();
this.setSize(300,400);
}

class ButtonEventHandle implements ActionListener{
@Override
public void actionPerformed(ActionEvent e) {
i++;
button.setText("you have clicked this button "+i+"times");
}
}

public static void main(String[] args) {
// TODO Auto-generated method stub
new ClicksNumber();
}

}