在 realpokeToSelect.add(temp);这句代码中，为何我输出的temp.number一直都是A？

package SPG;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

public class SimplePokeGame {

public void testcreatpoke(){

List<Poke> temppokeToSelect= new ArrayList<Poke>();

List<Poke> realpokeToSelect= new ArrayList<Poke>();

String[] x={"2","3","4","5","6","7","8","9","10","J","Q","K","A"};

System.out.println("----------创建扑克牌-------------");

   Poke[] poke={new Poke("黑桃",""),new Poke("红桃",""),new Poke("梅花",""),new Poke("方块","")};

   temppokeToSelect.addAll(Arrays.asList(poke));

   Poke temp=new Poke();

   for(int i=0;i<4;i++){

    temp= temppokeToSelect.get(i);

for(int k=0;k<13;k++){

  temp.number=x[k];

  System.out.println(temp.number);

  System.out.println("扑克牌为："+temp.color+temp.number);

      realpokeToSelect.add(temp);

}

}

   Poke a= realpokeToSelect.get(0);

   Poke b= realpokeToSelect.get(1);

   Poke c= realpokeToSelect.get(2);

   System.out.println(a.number+":"+b.number+":"+c.number);

   System.out.println("---------扑克牌创建成功------------");

   for (Poke poke2 : realpokeToSelect) {

System.out.println("扑克牌为："+poke2.color+poke2.number);

}

//    System.out.println();

   }

public static void main(String[] args) {

        SimplePokeGame it = new SimplePokeGame();

        it.testcreatpoke();

}