如何使用非匿名内部类来创建按钮事件？请帮小白修改类型不符的问题。

Question

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Sl14 extends JFrame{
JPanel jp=new JPanel();
JButton jb=new JButton();
int k=0;
public Sl14(){
JLabel j1=new JLabel();
JLabel j2=new JLabel();
j1.setText("创建面板快乐管理局");
j2.setText("创建2便签");
j1.setVerticalAlignment(JLabel.CENTER);
j1.setHorizontalAlignment(JLabel.CENTER);
j1.setBounds(0,0,500,200);
j2.setBounds(100,100,500,200);
this.add(j1);
this.add(j2);
jb.setText("按钮0次");
jb.setMnemonic('G');//设置“Alt+G”组合键起到单击按钮的作用
jp.add(jb);
jb.addActionListener(this);
this.add(jp);
Image i=this.getToolkit().getImage("a.jpg");
this.setIconImage(i);
this.setTitle("设计窗口标题");
this.setBounds(300,250,500,300);
this.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
this.jb.setText("按钮"+(++k)+"次");
}
public static void main(String[] args) {
Sl14 s=new Sl14();
}

}

Answer 1

直接在JFrame里写的话要在class那加上implements ActionListener，不过还是建议用匿名内部类或私有内部类