cardlayoutdemo.java

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// 例 6.4.6 CardLayoutDemo.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;  // 用于设置边框
public class CardLayoutDemo implements ActionListener
{
	JFrame jframe;
	JPanel jp_button,jp_cards;
	JLabel jlb1,jlb2;
	CardLayout cards;
	JButton button1,button2;
	public CardLayoutDemo()
{
		jframe = new JFrame("CardLayout演示窗口");
		Container c = jframe.getContentPane();
		cards = new CardLayout(); // 定义一个卡片布局管理器的对象
	    jp_cards = new JPanel();
		jp_cards.setLayout(cards); // 设置当前面板容器的布局为卡片布局
		
		jlb1 = new JLabel("I am David");
		jlb2 = new JLabel("I am Lucy");
		JPanel card1 = new JPanel(); // 制作第一个卡片容器
		card1.add(jlb1);
		card1.setBorder(new TitledBorder("这是第一张卡片"));
		JPanel card2 = new JPanel();  // 制作第二个卡片容器
		card2.add(jlb2);
		card2.setBorder(new TitledBorder("这是第二张卡片"));
		// 向卡片布局容器中添加卡片容器card1和card2，并指定它们的名字
		jp_cards.add(card1,"card1"); 
		jp_cards.add(card2,"card2");

		c.add(jp_cards,BorderLayout.CENTER);
		
		jp_button = new JPanel();
		button1 = new JButton("卡片1");
		button2 = new JButton("卡片2");
		button1.addActionListener(this);
		button2.addActionListener(this);
		jp_button.add(button1);
		jp_button.add(button2);
		c.add(jp_button,BorderLayout.SOUTH);
		
		jframe.setSize(200,150);
		jframe.setVisible(true);
		jframe.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e){
				System.exit(0);
			}
		}); 
	}
	public void actionPerformed(ActionEvent e)
{
		if(e.getSource() == button1)
			cards.show(jp_cards,"card1");  // 调用卡片布局对象的show()方法
		else 
			cards.show(jp_cards,"card2");
	}
	public static void main(String[] args)
{
		new CardLayoutDemo();
	}
}