If any thread is in sleeping or waiting state (i.e. sleep() or wait() is invoked), calling the interrupt() method on the thread, breaks out the sleeping or waiting state throwing InterruptedException. If the thread is not in the sleeping or waiting state, calling the interrupt() method performs normal behaviour and doesn’t interrupt the thread but sets the interrupt flag to true. Let’s first see the methods provided by the Thread class for thread interruption.
The 3 methods provided by the Thread class for interrupting a thread
public void interrupt()
public static boolean interrupted()
public boolean isInterrupted()
Example of interrupting a thread that stops working
In this example, after interrupting the thread, we are propagating it, so it will stop working. If we don’t want to stop the thread, we can handle it where sleep() or wait() method is invoked. Let’s first see the example where we are propagating the exception.