New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

2019-12-10：谈一谈java线程安全的集合有哪些？ #208

Open

MoJieBlog opened this issue Dec 10, 2019 · 2 comments

Labels

Java

Collaborator

MoJieBlog commented Dec 10, 2019

最近找题要找好久。更新有点不及时，抱歉。

Moosphan added the Java label

feelschaotic commented Dec 23, 2019

早期的线程安全集合

Vector
= 全部方法加 synchronized 的 ArrayList
HashTable
= 全部方法加 synchronized 的 HashMap

包装工具类

Collections.synchronizedXXX()
在原集合的基础上添加了锁对象，集合中的每个方法都通过这个锁对象实现同步

java.util.concurrent包

ConcurrentHashMap
1.7 分段锁技术，1.8 对table每行首元素加锁
CopyOnWriteXXXX
加了写锁，写的时候锁住的整个对象，读则可以并发执行

其他

Stack
继承了 Vector

senlinxuefeng commented Jan 7, 2022

补充
BlockingQueue

StringBuffer

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment