public static void main(String[] args) { HazelcastInstance hz = Hazelcast.newHazelcastInstance(); IAtomicLong atomicLong = hz.getAtomicLong("counter"); atomicLong.set(1); long result = atomicLong.apply(new Add2Function()); System.out.println("apply.result:" + result); System.out.println("apply.value:" + atomicLong.get()); atomicLong.set(1); atomicLong.alter(new Add2Function()); System.out.println("alter.value:" + atomicLong.get()); atomicLong.set(1); result = atomicLong.alterAndGet(new Add2Function()); System.out.println("alterAndGet.result:" + result); System.out.println("alterAndGet.value:" + atomicLong.get()); atomicLong.set(1); result = atomicLong.getAndAlter(new Add2Function()); System.out.println("getAndAlter.result:" + result); System.out.println("getAndAlter.value:" + atomicLong.get()); System.exit(0); for (; ; ) { long oldValue = atomicLong.get(); long newValue = oldValue + 2; if (atomicLong.compareAndSet(oldValue, newValue)) { break; } } }