What does java.lang.Thread.interrupt() do and how does it work?
The java.lang.Thread.interrupt() method ensures that the target thread's interrupted flag/status is set. This action triggers the target thread to check its interrupted status and respond appropriately.
Interruption in Java is a collaborative process requiring cooperation from both threads:
Pre-emption vs. Cooperation
Unlike in certain other programming languages, interruption in Java is cooperative. That is, both threads must cooperate for the interrupt to be processed successfully. If the target thread never checks its interrupted status, the interrupt will be effectively ignored.
Built-in Interrupt Handling
Certain API methods come with built-in interrupt handling, including:
Interruption as a Nudging Mechanism
Thread interruption serves as a gentle and polite way to request that a thread gracefully exits. Unlike Thread.stop(), which abruptly terminates the thread, interruption allows the thread to clean up and finish executing any tasks before exiting.
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