扑克洗牌

package card;
import java.util.*;
//洗牌作业,补的洗牌作业，没看老师的自己做的，有个疑问，我把集合定义成静态属性，但是好像不能用
public class Card {


/**
* @param args
*/
public static LinkedList list;

public static void main(String[] args) {
// TODO Auto-generated method stub
LinkedList list = new LinkedList();
for(int i =0;i<4;i++){
for(int j =0;j <13;j++){
if(j == 0){
if(i == 0){
String a ="黑桃";
list.add(new Poker(a,"A"));
}else if( i == 1)
{
String b ="红心";
list.add(new Poker(b,"A"));
}else if(i == 2){
String c ="梅花";
list.add(new Poker(c,"A"));
}else if(i == 3){
String d ="方块";
list.add(new Poker(d,"A"));
}
}else{
if(i== 0){
String a ="黑桃";
list.add(new Poker(a,j+1));

  }else if( i == 1)
  {
String b ="红心";
list.add(new Poker(b,j+1));
   }else if(i == 2){
String c ="梅花";
list.add(new Poker(c,j+1));
   }else if(i == 3){
String d ="方块";
list.add(new Poker(d,j+1));
    }
}
}
}
//print();





System.out.println(list);
System.out.println(list.size());
for(int p =0;p<1000;p++){
//交换
Random random = new Random();
int r = random.nextInt(52);
int r1 =random.nextInt(52);
Poker index =  (Poker)list.get(r);
Poker index1 =  (Poker)list.get(r1);
// 改
// *  E set(int index, E element) 
list.set(r, index1);
list.set(r1, index);
}
System.out.println(list);
}

}
class Poker
{
Object number;
String color;
public Poker(String color,Object number){
this.color = color;
this.number = number;

}
public String toString(){
return "花色:"+color+"大小:"+number;
}
}