修改下面的代码，实现点击按钮Add时，标签显示数字增加的功能

import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class MyFrame extends JFrame implements ActionListener{
private int number = 0;
private JLabel label;
public MyFrame(){
Container container = getContentPane();
container.setLayout(new FlowLayout());
container.add(new JButton("Add"));
label = new JLabel(String.valueOf(number));
container.add(label);
}
public void actionPerformed(ActionEvent e){
number ++;
label.setText(number);
}
public static void main(String[] args){
MyFrame frame = new MyFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
}

import java.awt.Container;
import