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Update ArrayList.md

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Java相关/ArrayList.md
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@ -85,7 +85,7 @@ public class ArrayList<E> extends AbstractList<E>
} }
/** /**
*默认构造函数，其默认初始容量为10 *默认构造函数，DEFAULTCAPACITY_EMPTY_ELEMENTDATA 为0.初始化为10，也就是说初始其实是空数组 当添加第一个元素的时候数组容量才变成10
*/ */
public ArrayList() { public ArrayList() {
this.elementData = DEFAULTCAPACITY_EMPTY_ELEMENTDATA; this.elementData = DEFAULTCAPACITY_EMPTY_ELEMENTDATA;