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card = new CardLayout(5,5);//5,5是组件间隔 pane = new JPanel(card); pane.add(p_1, "p1");//添加panel并指定名字 pane.add(p_2, "p2"); pane.add(p_3, "p3"); card.show(pane, "p1");//显示指定的panel |
完整代码
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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 * * @blog http://blog.csdn.net/mq612 */public class testCardLayout 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 testCardLayout() { 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");//添加panel并指定名字 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 testCardLayout(); }} |