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Asked: 2026-05-12T07:30:50+00:00

new Timer(…).schedule(task) Is task guaranteed to be run by a single thread at any

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new Timer(...).schedule(task)

Is task guaranteed to be run by a single thread at any given time?

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  1. Editorial Team

    From the Javadoc

    Corresponding to each Timer object is a single background thread that is used to execute all of the timer’s tasks, sequentially. Timer tasks should complete quickly. If a timer task takes excessive time to complete, it “hogs” the timer’s task execution thread. This can, in turn, delay the execution of subsequent tasks, which may “bunch up” and execute in rapid succession when (and if) the offending task finally completes.

    So, yes, you get a new Thread (separate from the caller’s thread). Every task in that timer shares the same thread.

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