CardLayout 为此，如下所示。
import java.awt.BorderLayout;import java.awt.CardLayout;import java.awt.Color;import java.awt.Dimension;import java.awt.EventQueue;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.util.Random;import javax.swing.JComboBox;import javax.swing.Jframe;import javax.swing.JLabel;import javax.swing.JPanel;public class CardPanel extends JPanel { private static final Random random = new Random(); private static final JPanel cards = new JPanel(new CardLayout()); private static final JComboBox combo = new JComboBox(); private final String name; public CardPanel(String name) { this.name = name; this.setPreferredSize(new Dimension(320, 240)); this.setBackground(new Color(random.nextInt())); this.add(new JLabel(name)); } @Override public String toString() { return name; } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { create(); } }); } private static void create() { Jframe f = new Jframe(); f.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE); for (int i = 1; i < 9; i++) { CardPanel p = new CardPanel("Panel " + String.valueOf(i)); combo.addItem(p); cards.add(p, p.toString()); } JPanel control = new JPanel(); combo.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { JComboBox jcb = (JComboBox) e.getSource(); CardLayout cl = (CardLayout) cards.getLayout(); cl.show(cards, jcb.getSelectedItem().toString()); } }); control.add(combo); f.add(cards, BorderLayout.CENTER); f.add(control, BorderLayout.SOUTH); f.pack(); f.setLocationRelativeTo(null); f.setVisible(true); }}
