java图形界面点不同的按钮出现不同的颜色：

直接上代码：

import javax.swing.*;
import java.awt.*;


public class Imagepanel extends JFrame {
    private JButton button;
    private JButton button_1;
    private JButton button_2;
    private JPanel jPanel;

    public static void main(String[] args) {
        new Imagepanel();
    }

    Imagepanel() {
        button = new JButton("red");
        button_1 = new JButton("pink");
        button_2 = new JButton("green");
        jPanel = new JPanel();
        jPanel.add(button);
        jPanel.add(button_1);
        jPanel.add(button_2);
        setTitle("颜色演示");
        setSize(400, 300);
        setLocation(300, 300);
        this.add(jPanel);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
        button_1.addActionListener(actionEvent -> jPanel.setBackground(Color.pink));
//按钮的监听事件：

        button.addActionListener(actionEvent -> jPanel.setBackground(Color.red));
        button_2.addActionListener(actionEvent -> jPanel.setBackground(Color.green));
    }

}