事件处理

Posted 2021-11-28 xiaoqiuyueming

package Demo;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
    public class chuangkou implements ActionListener{
       JFrame f;
       JPanel p;
       JButton b;
       JLabel l;
    public chuangkou() {
        f=new JFrame();
        p=new JPanel(null);
        b=new JButton("确定");
        l=new JLabel();
        b.addActionListener(this);
        f.add(p);
        p.add(b);
        p.add(l);
        f.setVisible(true);
        f.setSize(400,400);
        l.setBounds(50,120,50,50);
        b.setBounds(150,150,80,80);
    }
        public static void main(String[] args) {
           new chuangkou();
    }
        public void actionPerformed(ActionEvent e) {
            p.setBackground(Color.pink);
            l.setText("嘿嘿嘿嘿嘿");
            b.setBounds(250,50,80,80);
        }

}