Java Thread destroy() method

Last Updated : 17 Mar 2025

The destroy() method of thread class is used to destroy the thread group and all of its subgroups. The thread group must be empty, indicating that all threads that had been in the thread group have since stopped.

Syntax

Return

It doesn't return any value.

Exception

IllegalThreadStateException: This exception throws if the thread group is not empty or if the thread group has already been destroyed.

SecurityException: If the current thread cannot modify this thread group.

Example

Output:

Thread-1 finished executing
Thread-2 finished executing
child thread destroyed
Parent thread destroyed