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interrupt method

Interrupting a blocked thread (wait, sleep, join) will clear the interruption status
Interrupting a normally running thread will not clear the interruption status.
The interrupt state can be used to stop a thread.

Two-stage termination model

Gracefully terminate the T2 thread in the T1 thread and give T2 a chance to take care of the aftermath (release locks and resources)

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Interrupting the park thread will not clear the interruption status
After the interrupt flag is true, calling park again will fail.

Not recommended method

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Will destroy the synchronized code block and cause deadlock

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