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ShapeÀàÊǼ¸¸ö¾ßÌåͼÐÎÀàµÄ¸¸Àà
package cn.edu.uibe.poly;
public class Shape {
public void draw(){
System.out.println("Shape.draw()");
}
}
RectangleÀàÊÇShapeÀàµÄÒ»¸ö×ÓÀà
package cn.edu.uibe.poly;
public class Rectangle extends Shape {
@Override
public void draw() {
System.out.println("»¾ØÐÎ");
}
}
CircleÀàÒ²ÊÇShapeÀàµÄ×ÓÀà
package cn.edu.uibe.poly;
public class Circle extends Shape{
@Override
public void draw() {
System.out.println("»Ô²");
}
}
TriangleÀàÊÇShapeÀàµÄÁíÍâÒ»¸ö×ÓÀà
package cn.edu.uibe.poly;
public class Triangle extends Shape{
@Override
public void draw() {
System.out.println("»Èý½ÇÐÎ");
}
}
ShapeDemoÀàÖÐËæ»úÉú³É¾ØÐΡ¢Ô²¡¢Èý½ÇÐΣ¬È»ºóÓÃShapeÀàÐ͵ÄÒýÓõ÷Óá£
package cn.edu.uibe.poly;
import java.util.*;
public class ShapeDemo {
Random rand = new Random();
public Shape createShape(){
int c = rand.nextInt(3);
Shape s = null;
switch(c){
case 0:
s = new Rectangle();
break;
case 1:
s = new Circle();
break;
case 2:
s = new Triangle();
break;
}
return s;
}
public static void main(
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public static void replaceString(String a,String b,String c){
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package socket;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class Server {
public static void main(String[] args) {
try {
ServerSocket server = new Se ......
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¡¡¡¡1¡¢Oracle8/8i/9iÊý¾Ý¿â£¨thinģʽ£©
¡¡¡¡¡¡¡¡Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
¡¡¡¡¡¡¡¡String url="jdbc:oracle:thin:@localhost:1521:orcl";
¡¡¡¡¡¡¡¡//orclΪÊý¾Ý¿âµÄSID
¡¡¡¡¡¡¡¡String user="test";
¡ ......