Swing CardLayout類

CardLayout類將容器中的每個組件排列為卡片。一次只能看到一張卡片，而容器則充當一疊卡片。

類聲明

以下是java.awt.CardLayout類的聲明 -

public class CardLayout
   extends Object
      implements LayoutManager2, Serializable

類構造函數

類方法

方法繼承

該類繼承以下類中的方法 -

• java.lang.Object

CardLayout示例

使用編輯器創建以下Java程式：CardLayoutDemo.java

package com.zaixian.layout;

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

public class CardLayoutDemo {
    private JFrame mainFrame;
    private JLabel headerLabel;
    private JLabel statusLabel;
    private JPanel controlPanel;
    private JLabel msglabel;

    public CardLayoutDemo() {
        prepareGUI();
    }

    public static void main(String[] args) {
        CardLayoutDemo swingLayoutDemo = new CardLayoutDemo();
        swingLayoutDemo.showCardLayoutDemo();
    }

    private void prepareGUI() {
        mainFrame = new JFrame("Java SWING CardLayout示例(xuhuhu.com)");
        mainFrame.setSize(400, 400);
        mainFrame.setLayout(new GridLayout(3, 1));

        headerLabel = new JLabel("", JLabel.CENTER);
        statusLabel = new JLabel("", JLabel.CENTER);
        statusLabel.setSize(350, 100);

        mainFrame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent windowEvent) {
                System.exit(0);
            }
        });
        controlPanel = new JPanel();
        controlPanel.setLayout(new FlowLayout());

        mainFrame.add(headerLabel);
        mainFrame.add(controlPanel);
        mainFrame.add(statusLabel);
        mainFrame.setVisible(true);
    }

    private void showCardLayoutDemo() {
        headerLabel.setText("Layout in action: CardLayout");

        final JPanel panel = new JPanel();
        panel.setBackground(Color.CYAN);
        panel.setSize(300, 300);

        CardLayout layout = new CardLayout();
        layout.setHgap(10);
        layout.setVgap(10);
        panel.setLayout(layout);

        JPanel buttonPanel = new JPanel(new FlowLayout());
        buttonPanel.add(new JButton("確定"));
        buttonPanel.add(new JButton("取消"));

        JPanel textBoxPanel = new JPanel(new FlowLayout());
        textBoxPanel.add(new JLabel("姓名:"));
        textBoxPanel.add(new JTextField(20));

        panel.add("按鈕", buttonPanel);
        panel.add("文本", textBoxPanel);
        final DefaultComboBoxModel panelName = new DefaultComboBoxModel();

        panelName.addElement("按鈕");
        panelName.addElement("文本");
        final JComboBox listCombo = new JComboBox(panelName);

        listCombo.setSelectedIndex(0);
        JScrollPane listComboScrollPane = new JScrollPane(listCombo);
        JButton showButton = new JButton("顯示結果");

        showButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String data = "";
                if (listCombo.getSelectedIndex() != -1) {
                    CardLayout cardLayout = (CardLayout) (panel.getLayout());
                    cardLayout.show(panel, (String) listCombo.getItemAt(listCombo.getSelectedIndex()));
                }
                statusLabel.setText(data);
            }
        });
        controlPanel.add(listComboScrollPane);
        controlPanel.add(showButton);
        controlPanel.add(panel);
        mainFrame.setVisible(true);
    }
}

執行上面示例代碼，得到以下結果：