Question

I want to close all thread which I started previously.

Thread.currentThread() gives me current thread, but what about others? How can I get them?

I think Thread.activeCount() returns the count of active threads in thread’s thread group, but I does not use ThreadGroup,
I just started threads using Thread thread = new Thread(new MyRunnable()).

So how can I achieve this?
thanks in advance…

Answer 1

You can use an ExecutorService instead which combines a thread pool with a queue of tasks.

ExecutorService service = Executors.newCachedThreadPool();
// or
ExecutorService service = Executors.newFixedThreadPool(THREADS);

// submit as many tasks as you want.
// tasks must honour interrupts to be stopped externally.
Future future = service.submit(new MyRunnable());

// to cancel an individual task
future.cancel(true);

// when finished shutdown
service.shutdown();