list中的add（）方法怎么一直只替換第一個數(shù)組?。?/h1>

public void Shuffle(){

System.out.println("請洗牌！");

Set<Card> cards1=new HashSet<Card>(cards);

cards=new ArrayList<Card>(cards1);

System.out.println("洗牌完成,請發(fā)牌！");

Player player1=new Player();

Player player2=new Player();

player1=players.get(0);

player2=players.get(1);

for(int i=0;i<4;i++){

Card cd1=cards.get(i);

int n=i%2;

switch(n){

case 0:

player1.getCards().add(cd1);

System.out.println(player1.getName()+"獲得的牌為："+cd1.getColour()+cd1.getName());

continue;

case 1:

player2.getCards().add(cd1);

System.out.println(player2.getName()+"獲得的牌為："+cd1.getColour()+cd1.getName());

continue;

}

}

}

1. 每次for循環(huán)都是把原來的給替換而不是在list序列后繼續(xù)添加怎么回事??？