java Swing GUI 入门-切换布局

java Swing GUI 入门-切换布局

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• 视频教程地址:https://www.bilibili.com/video/BV1Kt4y1k7o7/

布局

• 大部分和上一节: https://xuzhiwei.blog.csdn.net/article/details/111498257 的内容一致,新加入的内容有

1. 通过按钮切换Panel
2. Panel的叠加

• 布局,并向底部的ParentPanel中添加三个同等大小的panel相互叠加在一起.并且具有不同的颜色.
  

添加事件

• 向Button1中添加按钮事件以只显示panel1

        card1button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                parentPanel.removeAll();
                parentPanel.add(card1Panel);
                parentPanel.repaint();
                parentPanel.revalidate();
            }
        });
    }

• 向Button2中添加按钮事件以只显示panel2
• 向Button2中添加按钮事件以只显示panel3

        card2Button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                parentPanel.removeAll();
                parentPanel.add(card2Panel);
                parentPanel.repaint();
                parentPanel.revalidate();

            }
        });
        card3Button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                parentPanel.removeAll();
                parentPanel.add(card3Panel);
                parentPanel.repaint();
                parentPanel.revalidate();
            }
        });

效果演示

完整代码

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class CardLayout {
    private JPanel mainPanel;
    private JPanel buttonPanel;
    private JButton card1button;
    private JButton card2Button;
    private JButton card3Button;
    private JPanel card1Panel;
    private JPanel card2Panel;
    private JPanel parentPanel;
    private JPanel card3Panel;
    private JCheckBox checkBox1;
    private JRadioButton radioButton1;
    private JButton button1;

    public CardLayout() {
        card1button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                parentPanel.removeAll();
                parentPanel.add(card1Panel);
                parentPanel.repaint();
                parentPanel.revalidate();
            }
        });
        card2Button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                parentPanel.removeAll();
                parentPanel.add(card2Panel);
                parentPanel.repaint();
                parentPanel.revalidate();

            }
        });
        card3Button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                parentPanel.removeAll();
                parentPanel.add(card3Panel);
                parentPanel.repaint();
                parentPanel.revalidate();
            }
        });
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("Card Layout");
        frame.setContentPane(new CardLayout().mainPanel);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);
    }
}