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销毁并不只针对核心线程，会对核心线程和非核心线程一视同仁。 参见《Java 性能调优实战》
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感谢修正👍 |
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销毁并不只针对核心线程，会对核心线程和非核心线程一视同仁。
也就是allowCoreThreadTimeOut默认是false的情况下，线程数超过corePoolSize时，等待时间大于keepAliveTime，在回收空闲线程时，会对核心线程和非核心线程一视同仁，并不只回收非核心线程中的空闲线程，如果核心线程有空闲的也会回收，直到线程数等于corePoolSize。
额外补充：
allowCoreThreadTimeOut是true的情况下，即使线程数不超过corePollSize，等待时间大于keepAliveTime，即只有核心线程时，也会进行回收。
参见《Java 性能调优实战》