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1，一个线程可以调用interrupt方法来请求终止另一个线程的运行，也就是说线程的 run方法应该不时检查一下它是否应该退出。线程不应该连续不断地工作，应该偶尔进入睡眠或等待状态，以便其他线程由机会得以执行。但当一个线程进入睡眠状态时，它就无法检查自己是否应该终止运行。当另一个线程...

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1,防御性编程。必要时应当考虑采取保护性拷贝的手段来保护内部的私有数据，先来看下面这个例子：复制代码 pubic final class Period { private final Date start; private final Dat...

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