问题描述
Guava的ImmutableList.Builder的线程安全保证是什么?Javadocs不会说.
What are the thread safety guarantees for Guava's ImmutableList.Builder? The javadocs don't say.
推荐答案
虽然Guava不可变类是线程安全的，但其构建器却不是.对于大多数应用程序，只有一个线程将与任何特定的Builder实例进行交互.
While the Guava Immutable classes are threadsafe, their builders are not. For most applications, only one thread will interact with any particular Builder instance.
尽管通常不需要记录缺少线程安全性，但是对于Immutable集合构建器而言，这样的Javadoc可能很有意义.人们可能会惊讶于ImmutableList是线程安全的，而ImmutableList.Builder不是.
While the absence of thread-safety usually doesn't need to be documented, such Javadoc might make sense for the Immutable collection builders. People may be surprised that ImmutableList is threadsafe while ImmutableList.Builder isn't.
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