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;
/*
 * 在窗口有一个按钮点击这个按钮，按钮的点击次数会显示在这按钮上
 * */

public class Teste_5 {
    static Action a;
    public static void main(String[] args) {
        a=new Action();
    }
}
class Action implements ActionListener{
        JFrame f;
        JButton butt1;
        int i=0;
    Action(){
        JFrame f=new JFrame();
        JButton butt1=new JButton("i");
        f.setSize(400, 500);
        f.setLayout(new FlowLayout());
        Container con=f.getContentPane();
        con.add(butt1);
        butt1.addActionListener(this);
        f.setVisible(true);
    }
   
    public void actionPerformed(ActionEvent e){
        if(e.getSource()==butt1){
        int n=Integer.parseInt(butt1.getText());   
          n++;
            butt1.setText(String.valueOf(n));
        }
    }
}