Computer scienceProgramming languagesJavaWorking with dataMultithreadingSynchronization

Shared data

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Take a look at a class Worker. It extends the Thread class.

The class has one boolean field stopped and a method to set the field to true.

class Worker extends Thread {

    private boolean stopped = false;

    @Override
    public void run() {
        // do some work while stopped is false
    }

    public void stopIt() {
        this.stopped = true;
    }
}

The method stopIt will be invoked by other threads like:

worker.stopIt();

Select all correct statements about the given code.

Select one or more options from the list

It will always work fine (= will be stopped)

To make the code always stoppable we should add the final keyword to the field declaration

There are no guarantees that the worker will work correctly (be always stopped)

To make the code stop always we should add the volatile keyword to the field declaration

It's impossible to change the value of the field stopped from other threads

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