volatileで排他制御出来ると、いつから思ってた？ atomicやsynchronized使うべし - Qiita

volatileで排他制御出来ると、いつから思ってた？ atomicやsynchronized使うべしJava package test; import java.lang.reflect.Array; import java.util.ArrayList; import java.util.concurrent.atomic.AtomicInteger; public class Sync { private final int THREAD_NUM = 50; private final int COUNT_NUM = 1000; private static Sync instance = new Sync(); private int mCounter=0; private volatile int mVolatileCounter=0; private Object mSyncO