java 默认线程，如 DestroyJavaVM、Reference Handler、Signal Dispatcher
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Default threads like, DestroyJavaVM, Reference Handler, Signal Dispatcher
提问by Konrad Reiche
Working on a profiler of my own, I would like to explain what I see. There are some default threads which always appear, even in the simplest program:
在我自己的分析器上工作，我想解释我所看到的。有一些默认线程总是出现，即使在最简单的程序中：
- DestroyJavaVM
- Signal Dispatcher
- Finalizer
- Reference Handler
- 销毁JavaVM
- 信号调度员
- 终结器
- 引用处理程序
Although their names are quite self-documenting, I would like to get a little bit more information. It seems these threads are not documented, does someone know a source to dig for these information or even knows exactly what these threads do?
虽然他们的名字很自我记录，但我想获得更多信息。似乎这些线程没有记录，是否有人知道挖掘这些信息的来源，甚至确切地知道这些线程的作用？
回答by Suraj Chandran
- DestroyJavaVM is a thread that unloads the Java VM on program exit. Most of the time it should be waiting, until apocalypse of your VM.
- Signal Dispatcher is a thread that handles the native signals sent by the OS to your jvm.
- Finalizer threads pull objects from the finalization queue and calls it finalize method.
- Reference Handler is a high-priority thread to enqueue pending References. Its defined in java.lang.ref.References.java
- DestroyJavaVM 是在程序退出时卸载 Java VM 的线程。大多数时候它应该等待，直到你的虚拟机的启示。
- Signal Dispatcher 是一个线程，用于处理操作系统发送到 jvm 的本地信号。
- 终结器线程从终结队列中拉取对象并调用它的终结方法。
- Reference Handler 是一个高优先级线程，用于将待处理的References排入队列。它在 java.lang.ref.References.java 中定义
