private static int[] getStateCount(StateAccessingThread[] threads) {
        int[] valCount = new int[NUMBER_OF_STATES];
        for (StateAccessingThread thread : threads) {
            int val = thread.state;
            valCount[val] = valCount[val] + 1;
        }
        return valCount;
    }
This class demonstrates that threads accessing the STATE variable always see a consistent value. 

During ongoing initialization the observed value is either ONGOING_INITIALIZATION
or one of {SUCCESS, FAILURE}. 

Post initialization the observed value is always one of  {SUCCESS, FAILURE}.

See also http://jira.qos.ch/browse/SLF4J-167 

@author ceki
slf4j-api/src/test/java/org/slf4j/basicTests/DoubleCheckedInt.java