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Merged
Snailclimb merged 1 commit into from
Aug 3, 2019
Merged

hasMap 更正为 hashMap #412

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2 changes: 1 addition & 1 deletion docs/java/collection/Java集合框架常见面试题.md
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Expand Up @@ -109,7 +109,7 @@ public interface RandomAccess {
4. **初始容量大小和每次扩充容量大小的不同 ：** ①创建时如果不指定容量初始值，Hashtable 默认的初始大小为11，之后每次扩充，容量变为原来的2n+1。HashMap 默认的初始化大小为16。之后每次扩充，容量变为原来的2倍。②创建时如果给定了容量初始值，那么 Hashtable 会直接使用你给定的大小，而 HashMap 会将其扩充为2的幂次方大小（HashMap 中的`tableSizeFor()`方法保证，下面给出了源代码）。也就是说 HashMap 总是使用2的幂作为哈希表的大小,后面会介绍到为什么是2的幂次方。
5. **底层数据结构：** JDK1.8 以后的 HashMap 在解决哈希冲突时有了较大的变化，当链表长度大于阈值（默认为8）时，将链表转化为红黑树，以减少搜索时间。Hashtable 没有这样的机制。

**HasMap 中带有初始容量的构造函数：**
**HashMap 中带有初始容量的构造函数：**

```java
public HashMap(int initialCapacity, float loadFactor) {
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