Code reviewMediumcr-g004

Subject AtomicityLevel Mid–Senior~22 minCommon in Concurrency interviewsIndustries Software development

Question

Review this Java counter used by many request threads.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix — specific and kind.

Learn the concepts

Talk through your review

Code to reviewjava

1public class HitCounter {2    private volatile long count = 0;3 4    public void hit() {5        count = count + 1;6    }7 8    public long total() {9        return count;10    }11}

Run or narrate your approach, then ask the coach.