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# Java 集合框架补充知识点 #60

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frank-lam opened this issue Sep 22, 2020 · 0 comments
Open

# Java 集合框架补充知识点 #60

frank-lam opened this issue Sep 22, 2020 · 0 comments

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@frank-lam
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以下哪些java容器是线程安全的（ ）

  • Vector
  • ArrayList
  • HashSet
  • ConcurrentHashMap

Vector 是list的三个实现类里唯一一个线程安全的集合 它用了synchronized () 另外两个是实现类 ArrayList LinkedList
HashSet 线程不安全 无序集合
ConcurrentHashMap 该类位于 java.util.concurrent 包下，专门用于解决并发问题。 线程安全 另一个是 Hashtable
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@frank-lam