public class UserThreadFactory implements ThreadFactory {

    private final String namePrefix;
    private final AtomicInteger nextId = new AtomicInteger(1);

    UserThreadFactory(String whatFeatureOfGroup) {
        namePrefix = "UserThreadFactory's " + whatFeatureOfGroup + "-Worker-";
    }

    @Override
    public Thread newThread(@NotNull Runnable r) {
        String name = namePrefix + nextId.getAndIncrement();
        return new Thread(null, r, name, 0);
    }
}