java - 在 Java 中使用 CardLayout

Question

我目前正在尝试制作一款带有菜单的游戏。菜单看起来像这样。 http://puu.sh/xGoC

理想情况下，当我按下按钮时，它会带我进入游戏。游戏看起来像这样。 http://puu.sh/xGoV

我目前在运行菜单类或游戏类(两者都是 JPanel)的主类中初始化 JFrame()。

我将如何使用 CardLayout 来实现它，以便我可以初始化游戏菜单并在我单击按钮时将面板更改为游戏面板？

Answer 1

我为您准备了一些示例代码，它并不完美，但应该可以。基本上，您想在布局管理器上使用 NEXT 或 PREVIOUS 调用。

因为只有两个面板，我只使用 NEXT 调用来循环显示它们。如果您阅读 Swing 文档，这可能是最好的，这可行，但您可能还有其他要求。

import java.awt.CardLayout;


public class CardLayoutUsage extends javax.swing.JFrame {

    public CardLayoutUsage() {
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        containerPanel = new javax.swing.JPanel();
        menuPanel = new javax.swing.JPanel();
        jButton2 = new javax.swing.JButton();
        gamePanel = new javax.swing.JPanel();
        jButton1 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        containerPanel.setLayout(new java.awt.CardLayout());

        menuPanel.setBackground(new java.awt.Color(153, 255, 255));

        jButton2.setText("Go to Game");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout menuPanelLayout = new javax.swing.GroupLayout(menuPanel);
        menuPanel.setLayout(menuPanelLayout);
        menuPanelLayout.setHorizontalGroup(
            menuPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, menuPanelLayout.createSequentialGroup()
                .addContainerGap(135, Short.MAX_VALUE)
                .addComponent(jButton2)
                .addGap(149, 149, 149))
        );
        menuPanelLayout.setVerticalGroup(
            menuPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, menuPanelLayout.createSequentialGroup()
                .addContainerGap(141, Short.MAX_VALUE)
                .addComponent(jButton2)
                .addGap(134, 134, 134))
        );

        containerPanel.add(menuPanel, "card2");

        gamePanel.setBackground(new java.awt.Color(255, 255, 204));

        jButton1.setText("Go to Menu");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout gamePanelLayout = new javax.swing.GroupLayout(gamePanel);
        gamePanel.setLayout(gamePanelLayout);
        gamePanelLayout.setHorizontalGroup(
            gamePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, gamePanelLayout.createSequentialGroup()
                .addContainerGap(138, Short.MAX_VALUE)
                .addComponent(jButton1)
                .addGap(147, 147, 147))
        );
        gamePanelLayout.setVerticalGroup(
            gamePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, gamePanelLayout.createSequentialGroup()
                .addContainerGap(152, Short.MAX_VALUE)
                .addComponent(jButton1)
                .addGap(123, 123, 123))
        );

        containerPanel.add(gamePanel, "card3");

        getContentPane().add(containerPanel, java.awt.BorderLayout.CENTER);

        pack();
    }// </editor-fold>

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        CardLayout cl = (CardLayout)(containerPanel.getLayout());
        cl.next(containerPanel);
    }

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
        CardLayout cl = (CardLayout)(containerPanel.getLayout());
        cl.next(containerPanel);
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(CardLayoutUsage.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(CardLayoutUsage.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(CardLayoutUsage.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(CardLayoutUsage.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new CardLayoutUsage().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JPanel containerPanel;
    private javax.swing.JPanel gamePanel;
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JPanel menuPanel;
    // End of variables declaration
}