cardtest.java~9~

JAVA入门的一个很基础的程序

package cardtest;

import java.awt.*;
import java.awt.event.*;

//(0)参见教材P-118 程序8-4:
//CardTest是继承鼠标适配器(既:MouseAdapter)的类
//CardTest类内定义了三个函数
//main( )、init( )、mouseClicked ( MouseEvent e )
public class CardTest extends MouseAdapter{
    int i=1 ;
    public CardTest() {
        try {
            jbInit();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    Panel p1,p2,p3,p4,p5;
        Label l1,l2,l3,l4,l5;

        //(1)声明一个CardLayout类对象
        CardLayout myCard;
        Frame f;
        public static void main(String args[]){
          CardTest ct=new CardTest();
          ct.init();
        }

        public void init() {
          f=new Frame("Card Test");
          myCard=new CardLayout();
                f.setLayout(myCard);

                p1=new Panel();
                p2=new Panel();
                p3=new Panel();
                p4=new Panel();
                p5=new Panel();

        //(2)为每个Panel创建一个标签并设定不同的背景颜色，以便区分
    l1=new Label("This is the first Panel");
        p1.add(l1);
        p1.setBackground(Color.yellow);

        l2=new Label("This is the second Panel");
        p2.add(l2);
        p2.setBackground(Color.green);

        l3=new Label("This is the third Panel");
        p3.add(l3);
        p3.setBackground(Color.magenta);

        l4=new Label("This is the forth Panel");
        p4.add(l4);
        p4.setBackground(Color.white);

        l5=new Label("This is the fifth Panel");
        p5.add(l5);
        p5.setBackground(Color.cyan);

        //(3)设定(即:注册)鼠标事件的监听程序
        p1.addMouseListener(this);
        p2.addMouseListener(this);
        p3.addMouseListener(this);
        p4.addMouseListener(this);
        p5.addMouseListener(this);
        keyclick kc=new keyclick() ;
        //(4)将每个Panel作为一张卡片加入Frame
        f.add(p1,"First");
        f.add(p2,"Second");
        f.add(p3,"Third");
        f.add(p4,"Forth");
        f.add(p5,"Fifth");

        //(5)显示第一张卡片
        myCard.show(f,"First");
        f.setSize(300,200);
        f.show();
        }

        //(6)处理鼠标事件:
        //若单击鼠标键,则显示下一张卡片.
        //若已经显示到最后一张,则重新显示第一张.
        public void mouseClicked(MouseEvent e){
            i++;
            myCard.next(f);
            if (i==5){
                System.exit(0);
            }
        }


    private void jbInit() throws Exception {
    }
}

class keyclick extends KeyAdapter{
    public void keyPressed(KeyEvent e){
            System.exit(0);
    }
}
//编译源代码：Javac	CardTest.java
//运行字节码：Java	CardTest
//运行结果：若单击鼠标键,则显示下一张卡片