這部分收集觀看Effective Java針對Concurrency章節後所整理的心得。

• Synchronize access to shared mutable data
• Avoid excessive synchronization
• Prefer executors, tasks, and streams to threads
• Use lazy initialization judiciously
• Don’t depend on the thread scheduler
• Avoid thread groups 這是2nd的內容，3rd已消失

• Effective Java, 2/e
• Effective Java, 3/e
• 《Effective Java》读书笔记 - 10.并发