Here you can find the source of get(T stat, AtomicIntegerFieldUpdater
public static <T> int get(T stat, AtomicIntegerFieldUpdater<T> updater, boolean reset)
//package com.java2s; /*// w w w. j a v a 2 s . c o m * Copyright 1999-2101 Alibaba Group Holding Ltd. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.util.concurrent.atomic.AtomicInteger; import java.util.concurrent.atomic.AtomicIntegerFieldUpdater; import java.util.concurrent.atomic.AtomicLong; import java.util.concurrent.atomic.AtomicLongFieldUpdater; public class Main { public static <T> int get(T stat, AtomicIntegerFieldUpdater<T> updater, boolean reset) { if (reset) { return updater.getAndSet(stat, 0); } else { return updater.get(stat); } } public static <T> long get(T stat, AtomicLongFieldUpdater<T> updater, boolean reset) { if (reset) { return updater.getAndSet(stat, 0); } else { return updater.get(stat); } } public static long get(AtomicLong counter, boolean reset) { if (reset) { return counter.getAndSet(0); } else { return counter.get(); } } public static int get(AtomicInteger counter, boolean reset) { if (reset) { return counter.getAndSet(0); } else { return counter.get(); } } }