我已经在cardlist数组中添加了一些数组索引。我想避免添加那些 具有相同值的索引。我需要改变什么?我想跳过添加存储在数组中的相同值
playerHand.player_hand.add(cardList.get(lastCardIndex));
playerHand.player_hand.add(cardList.get(lastCardIndex - 1));
playerHand.player_hand.add(cardList.get(lastCardIndex - 2));
playerHand.player_hand.add(cardList.get(lastCardIndex - 3));
playerHand.player_hand.add(cardList.get(lastCardIndex - 4));