使用卡布局更改面板

嗨，我很抱歉，如果这已经发布但我看起来很难找到其他代码，我无法理解。 我是java编程的新手，并希望有人指出我如何通过按下按钮更改为所需的面板。 任何帮助将受到高度赞赏。 我只想完全理解这个概念是如何工作的。

import java.awt.*; import java.awt.event.*; import javax.swing.*; // Packages used in this program imported public class onlineGame extends JFrame implements ActionListener { JPanel cards; JButton button1, button2, button3; public onlineGame() //This is the CONSTRUCTOR method { //The entry point into your program setLayout(new FlowLayout()); //Use this for now. setSize(810, 510); //Set the size of the JFrame setTitle("Generic Card Game"); //Put Title on top of JFrame setBackground(Color.yellow); setResizable(false); button1 = new JButton("THIS IS BUTTON 1"); button2 = new JButton("THIS IS BUTTON 2"); button3 = new JButton("THIS IS BUTTON 3"); button1.addActionListener(this); button2.addActionListener(this); button3.addActionListener(this); //Create the cards JPanel card1 = new JPanel(); card1.add(button1); JPanel card2 = new JPanel(); card2.add(button2); JPanel card3 = new JPanel(); card3.add(button3); //Create the panel that contains the "cards". cards = new JPanel(new CardLayout()); cards.add(card1); cards.add(card2); cards.add(card3); getContentPane().add(cards); setVisible(true); //Make JFrame visible } public void actionPerformed(ActionEvent e) { if (e.getSource() == button1){ //What do i put here to change to Panel card2 or card3 and so on. } } public static void main(String args[]) { new onlineGame(); // This calls the constructor and runs it } } 

Answer 1

要切换到任意面板，请确保在添加卡组件时指定约束：

 cards.add(card1, "Card 1"); cards.add(card2, "Card 2"); cards.add(card3, "Card 3"); 

然后翻转到另一个组件：

 CardLayout cardLayout = (CardLayout) cards.getLayout(); cardLayout.show(cards, "Card 2"); 

要导航到下一个组件，您可以使用：

 cardLayout.next(cards); 

阅读： CardLayout