Java newCachedThreadPool 创建线程池
2017-08-22 16:57
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创建一个可缓存的线程池，线程池理论上无限大（受制于操作系统及JVM的内存设置），优点在于不需要预先确定所需要的线程数
若有线程不需要，可自动回收线程，如任务数超过线程数，会自动创建新线程
与newFixedThreadPool不同，newFixedThreadPool的线程数量是固定的，使用线程数达到上限后，任务会等待执行。固定线程数量是更安全，更可控的
若有线程不需要，可自动回收线程，如任务数超过线程数，会自动创建新线程
与newFixedThreadPool不同，newFixedThreadPool的线程数量是固定的，使用线程数达到上限后，任务会等待执行。固定线程数量是更安全，更可控的
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