Java面試常常會問到的線程池，你搞清楚了嗎?

線程池 爲何要用線程池？ Executor繼承關係 構造函數各個參數含義 int corePoolSize int maximumPoolSize long keepAliveTime TimeUnit unit BlockingQueue< Runnable > workQueue ThreadFactory threadFactory RejectedExecutionHandler 線程池的

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