Java学习之CardLayout的使用

快来打我* 2023-01-18 06:40 127阅读 0赞

**案例介绍：**

在编码前需要将本案例中使用到的三张图片（1.png 、2.png、3.png）保存到src所在的文件夹内。看下图：

2.png：  
![在这里插入图片描述][20210501114621250.png_pic_center]

3.png：  
![在这里插入图片描述][20210501114638521.png_pic_center]

**案例代码：**

import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    public class ShowCardLayout 
    		extends MouseAdapter{
        
    		private JFrame f;
    		private JPanel p1,p2,p3;
    		private JLabel lb1,lb2,lb3;
    		private CardLayout myCard;
    		private Container c;
    		public ShowCardLayout(){
        
    		f=new JFrame("CardLayout示例");
    		myCard=new CardLayout(5,10);
    		p1=new JPanel();
    		p2=new JPanel();
    		p3=new JPanel();
    		lb1=new JLabel(
    				new ImageIcon("1.png"));
    		lb2=new JLabel(
    				new ImageIcon("2.png"));
    		lb3=new JLabel(
    				new ImageIcon("3.png"));
    		}
    		public void launchFrame(){
        
    			c=f.getContentPane();
    			c.setLayout(myCard);		
    			p1.add(lb1);
    			p2.add(lb2);
    			p3.add(lb3);
    			p1.addMouseListener(this);
    			p2.addMouseListener(this);
    			p3.addMouseListener(this);
    			c.add(p1,"First");
    			c.add(p2,"Second");
    			c.add(p3,"Third");
    			myCard.show(c,"Third");
    			f.pack();
    			f.setVisible(true);
    			f.setDefaultCloseOperation(
    				JFrame.EXIT_ON_CLOSE);
    		}
    		public void mousePressed(MouseEvent e){
        
    			myCard.next(c);
    		}
    		public static void main(String args[]) {
        
    			ShowCardLayout sc=
    					new ShowCardLayout();
    			sc.launchFrame();
    		}
    }

**案例运行图：**  
依次点击运行窗口就会出现1.png 、2.png、3.png。

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NzA2MjkwNw_size_16_color_FFFFFF_t_70_pic_center 2]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NzA2MjkwNw_size_16_color_FFFFFF_t_70_pic_center 3]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NzA2MjkwNw_size_16_color_FFFFFF_t_70_pic_center 4]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NzA2MjkwNw_size_16_color_FFFFFF_t_70_pic_center]: /images/20221021/45c43aa370384b768552b9533be1ed67.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NzA2MjkwNw_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221021/20977c9915164d1a973e34c0b13f5ba6.png
[20210501114621250.png_pic_center]: /images/20221021/38cba84034e24c828ec4f7975db64358.png
[20210501114638521.png_pic_center]: /images/20221021/1f98427442c74cdcb1458a44d1327370.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NzA2MjkwNw_size_16_color_FFFFFF_t_70_pic_center 2]: /images/20221021/d0fa968b9344476c834cc46d60c9de1b.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NzA2MjkwNw_size_16_color_FFFFFF_t_70_pic_center 3]: /images/20221021/75a7a304e0f84c9e8f1532982b615029.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NzA2MjkwNw_size_16_color_FFFFFF_t_70_pic_center 4]: /images/20221021/a2b1080b4223434b8e283b4115d96285.png