Java multithreading, capture updated boolean variables

Question

I want to do something like this

while (true) {
    if (my_boolean) {  //my_boolean is being updated by other threads
        do something;
        break;
    }
    do something else;
}

my problem is, my_boolean is being updated by another method in another thread. Sometimes such updates can be captured, sometimes not. Is there any consistent way to work around this?

Downvoted. Check any java multithreading tutorial. Or search in StackOverflow before posting a question. This has been asked many times. — Mario Codes, Sep 03 '20 at 10:29

Dorian Gray · Answer 1 · 2020-09-02T16:24:48.007

1

You can declare that boolean as volatile.

edited Sep 02 '20 at 16:24

answered Sep 02 '20 at 15:32

Dorian Gray

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You don't have to. There are other ways to achieve the same effect. – Andy Turner Sep 02 '20 at 15:33
This might also lead to a race condition if there are multiple threads that write that variable. – Alex R Sep 02 '20 at 15:35
@Andy Turner: I don't see your point. I didn't say that my solution is the only possible one. Okay, the word "must" might get misunderstood. – Dorian Gray Sep 02 '20 at 16:19

Java multithreading, capture updated boolean variables

1 Answers1