1 /* 2 涉及Panel中的图片的加载，还有Frame的关闭的方法， CardLayout（int hgap, int vgap）就会决定卡片面板的大小 3 匿名类的使用。。。 4 */ 5 import java.awt.*; 6 import java.awt.event.*; 7 import javax.swing.*; 8 public class CardLayoutDemo extends Frame{ 9    Panel pCards=new Panel();//卡片面板10    CardLayout Clayout=new CardLayout(120, 50);//设置卡片和面板边界的垂直和水平距离11    public CardLayoutDemo(){12          setLayout(new BorderLayout(100, 20));13          Panel pBtn = new Panel();//按钮面板14         15            pCards.setLayout(Clayout);16            //pCards.setPreferredSize(new Dimension(30,40));//这句不再起作用了：因为其父类CardLayoutDemo使用的是BorderLayout布局方式，会自动填充17            pCards.setBackground(Color.red);18            pBtn.setBackground(Color.yellow);19        pBtn.setLayout(new FlowLayout(FlowLayout.CENTER, 10, 10));20            pBtn.setPreferredSize(new Dimension(200, 50));21 22           Button tmpB;23        pBtn.add(tmpB = new Button("第一张"));24              tmpB.addActionListener(new myActionListener());25                tmpB.setActionCommand("first");26        pBtn.add(tmpB = new Button("下一张"));27              tmpB.addActionListener(new myActionListener());28                tmpB.setActionCommand("next");29 30        pBtn.add(tmpB = new Button("前一张"));31              tmpB.addActionListener(new myActionListener());32                tmpB.setActionCommand("previous");33 34        pBtn.add(tmpB = new Button("最后一张"));35              tmpB.addActionListener(new myActionListener());36                tmpB.setActionCommand("last");37          38          39        for(int i=1; i<=4; ++i){40               myPanel tmpP;41             pCards.add(""+i, tmpP=new myPanel(i){42                   public void paint(Graphics g){43               g.drawImage(new ImageIcon("zjy"+i+".jpg").getImage(), 20, 0, 300, 400, this);44              }45             });46               tmpP.setBackground(Color.blue);47               //tmpP.setSize(new Dimension(300, 400));//tmpP接受了匿名类对象，可以通过这种方法更改匿名类的属性48               //这里不设置的原因是它的大小由CardLayout(int hgap, int vgap)决定了49          }50            add(pBtn, "North");51            add(pCards, "Center");52    }53    class myActionListener implements ActionListener{54     public void actionPerformed(ActionEvent e){55        String str=e.getActionCommand();56        if(str.equals("first"))57            Clayout.first(pCards);58         else if(str.equals("next"))59            Clayout.next(pCards);60         else if(str.equals("previous"))61            Clayout.previous(pCards);62         else if(str.equals("last"))63            Clayout.last(pCards);64        }65     } 66     67     public static void main(String args[]){68        CardLayoutDemo myWindow = new CardLayoutDemo();69        myWindow.setSize(new Dimension(600, 600));70        myWindow.setResizable(false);71        myWindow.addWindowListener(new myClosingListener());72        myWindow.setVisible(true);73     }74 }75 76 77 class myClosingListener extends WindowAdapter{78    public void windowClosing(WindowEvent e){79       System.exit(0);80    }81 }82 83 class myPanel extends Panel{84    int i;85    public myPanel(int i){86       this.i=i;87    }88 }