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java-util-timer-class-java.md
Timer 类提供了一个方法调用,线程使用该方法调用来调度任务,例如在某个规则的瞬间后运行一个代码块。每个任务可以被安排运行一次或重复执行多次。每个计时器对象都与一个负责执行计时器对象所有任务的后台线程相关联。 注: 定时器类是线程安全的。
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