CODEWITHSUNDEEP
javamultithreadingrunnable
thi gg
thi gg

Reputation: 2073

How to stop a java 8 lambda-runnable-thread

I would like to stop this thread:

Runnable run = () -> { while(true)[...]; };
run.run();

But there is no run.stop() method.

Please suggest either an other as short as possible method to start and stop a thread or a method to stop this running... thing.

Upvotes: 3

Views: 4411

Answers (3)

user3458
user3458

Reputation:

Runnable.run() does not create a thread. You're invoking the run() method in your current thread. To create a thread you need to do just that: create and start a thread:

Thread t = new Thread(run);
t.start();

Then later on you can invoke 

t.interrupt();

Please read the javadocs on Thread.interrupt() on how to structure your run() method to be interruptable.

Upvotes: 9

sol4me
sol4me

Reputation: 15698

In order to stop a thread ,first create a thread like this

Thread thread = new Thread(run);

and in order to start the thread call 

thread.start();

The start method will call run method but if you call run() method directly then no new thread will be created and the code will be executed in the existing thread. In order to stop the method you can use interrupt

Upvotes: 1

pveentjer
pveentjer

Reputation: 11307

The simplest thing you normally do is to add a volatile boolean field to the runnable that is set by a different thread.

In your case you might perhaps use an AtomicBoolean instead of a volatile field and capture that in the closure. Once the closure is created, you can use this AtomicBoolean to stop.

Upvotes: 1

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