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什么是daemon thread   

2006-12-05 13:53:38|  分类: 爪哇岛 |  标签: |举报 |字号 订阅

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    daemon thread是守护线程,它在程序的背后提供服务的线程,它自贯穿程序始终,当程序结束了,它也就结束了,如果还有非守护线程的线程在执行,它就不会结束。

    A daemon is simply a thread that has no other role in life than to serve others. Examples are timer threads that send regular "timer ticks" to other threads. When only daemon threads remain, the virtual machine exits. There is no point in keeping the program running if all remaining threads are daemons.

API:java.lang.Thread      

 public final void setDaemon(boolean on)
Marks this thread as either a daemon thread or a user thread. The Java Virtual Machine exits when the only threads running are all daemon threads.

This method must be called before the thread is started.

This method first calls the checkAccess method of this thread with no arguments. This may result in throwing a SecurityException (in the current thread).

       

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