Java中CardLayout卡片布局管理器使用的小例子，javacardlayout,import java.

Java中CardLayout卡片布局管理器使用的小例子，javacardlayout,import java.

import java.awt.BorderLayout;import java.awt.CardLayout;import java.awt.Color;import java.awt.Insets;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.UIManager;/** * Java中CardLayout布局管理器使用的小例子 * * @author 五斗米 <如转载请保留作者和出处> * @blog <a href="http://blog.csdn.net/mq612">http://blog.csdn.net/mq612 */public class TestMain extends JFrame {    private JPanel pane = null; // 主要的JPanel，该JPanel的布局管理将被设置成CardLayout    private JPanel p = null; // 放按钮的JPanel    private CardLayout card = null; // CardLayout布局管理器    private JButton button_1 = null; // 上一步    private JButton button_2 = null; // 下一步    private JButton b_1 = null, b_2 = null, b_3 = null; // 三个可直接翻转到JPanel组件的按钮    private JPanel p_1 = null, p_2 = null, p_3 = null; // 要切换的三个JPanel    public TestMain() {        super("CardLayout Test");        try {            // 将LookAndFeel设置成Windows样式            UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");        } catch (Exception ex) {            ex.printStackTrace();        }        /**创建一个具有指定的水平和垂直间隙的新卡片布局*/        card = new CardLayout(5, 5);        pane = new JPanel(card); // JPanel的布局管理将被设置成CardLayout        p = new JPanel(); // 构造放按钮的JPanel        button_1 = new JButton("< 上一步");        button_2 = new JButton("下一步 >");        b_1 = new JButton("1");        b_2 = new JButton("2");        b_3 = new JButton("3");        b_1.setMargin(new Insets(2,2,2,2));        b_2.setMargin(new Insets(2,2,2,2));        b_3.setMargin(new Insets(2,2,2,2));        p.add(button_1);        p.add(b_1);        p.add(b_2);        p.add(b_3);        p.add(button_2);        p_1 = new JPanel();        p_2 = new JPanel();        p_3 = new JPanel();        p_1.setBackground(Color.RED);        p_2.setBackground(Color.BLUE);        p_3.setBackground(Color.GREEN);        p_1.add(new JLabel("JPanel_1"));        p_2.add(new JLabel("JPanel_2"));        p_3.add(new JLabel("JPanel_3"));        pane.add(p_1, "p1");        pane.add(p_2, "p2");        pane.add(p_3, "p3");        /**下面是翻转到卡片布局的某个组件，可参考API中的文档*/        button_1.addActionListener(new ActionListener(){ // 上一步的按钮动作            public void actionPerformed(ActionEvent e) {                card.previous(pane);            }        });        button_2.addActionListener(new ActionListener(){ // 下一步的按钮动作            public void actionPerformed(ActionEvent e) {                card.next(pane);            }        });        b_1.addActionListener(new ActionListener() { // 直接翻转到p_1            public void actionPerformed(ActionEvent e) {                card.show(pane, "p1");            }        });        b_2.addActionListener(new ActionListener() { // 直接翻转到p_2            public void actionPerformed(ActionEvent e) {                card.show(pane, "p2");            }        });        b_3.addActionListener(new ActionListener() { // 直接翻转到p_3            public void actionPerformed(ActionEvent e) {                card.show(pane, "p3");            }        });        this.getContentPane().add(pane);        this.getContentPane().add(p, BorderLayout.SOUTH);        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        this.setSize(300, 200);        this.setVisible(true);    }    public static void main(String[] args) {        new TestMain();    }}//该片段来自于http://byrx.net