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Update arraylist-source-code.md

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docs/java/collection/arraylist-source-code.md
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@ -150,7 +150,8 @@ public class ArrayList<E> extends AbstractList<E>
ensureExplicitCapacity(minCapacity); ensureExplicitCapacity(minCapacity);
} }
} }
//得到最小扩容量 //1.得到最小扩容量
//2.通过最小容量扩容
private void ensureCapacityInternal(int minCapacity) { private void ensureCapacityInternal(int minCapacity) {
if (elementData == DEFAULTCAPACITY_EMPTY_ELEMENTDATA) { if (elementData == DEFAULTCAPACITY_EMPTY_ELEMENTDATA) {
// 获取“默认的容量”和“传入参数”两者之间的最大值 // 获取“默认的容量”和“传入参数”两者之间的最大值