将数组转换为 ArrayList [英] Convert an array into an ArrayList

问题描述

我在 Java 中将数组转换为 ArrayList 时遇到了很多麻烦.这是我现在的数组:

I'm having a lot of trouble turning an array into an ArrayList in Java. This is my array right now:

Card[] hand = new Card[2];

hand"持有一系列卡片".这看起来像一个 ArrayList?

"hand" holds an array of "Cards". How this would look like as an ArrayList?

推荐答案

作为 ArrayList 该行将是

import java.util.ArrayList;
...
ArrayList<Card> hand = new ArrayList<Card>();

要使用 ArrayList 你必须做的

hand.get(i); //gets the element at position i 
hand.add(obj); //adds the obj to the end of the list
hand.remove(i); //removes the element at position i
hand.add(i, obj); //adds the obj at the specified index
hand.set(i, obj); //overwrites the object at i with the new obj

另请阅读此http://docs.oracle.com/javase/6/docs/api/java/util/ArrayList.html

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