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Java example source code file (AtomicLong.java)

This example Java source code file (AtomicLong.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

atomiclong, number, override, string

The AtomicLong.java Java example source code

/*
 * Copyright (C) 2011 The Guava Authors
 *
 * 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.
 */

package java.util.concurrent.atomic;

/**
 * GWT emulated version of {@link AtomicLong}.  It's a thin wrapper
 * around the primitive {@code long}.
 *
 * @author Jige Yu
 */
public class AtomicLong extends Number implements java.io.Serializable {

  private long value;

  public AtomicLong(long initialValue) {
    this.value = initialValue;
  }

  public AtomicLong() {
  }

  public final long get() {
    return value;
  }

  public final void set(long newValue) {
    value = newValue;
  }

  public final void lazySet(long newValue) {
    set(newValue);
  }

  public final long getAndSet(long newValue) {
    long current = value;
    value = newValue;
    return current;
  }

  public final boolean compareAndSet(long expect, long update) {
    if (value == expect) {
      value = update;
      return true;
    } else {
      return false;
    }
  }

  public final long getAndIncrement() {
    return value++;
  }

  public final long getAndDecrement() {
    return value--;
  }

  public final long getAndAdd(long delta) {
    long current = value;
    value += delta;
    return current;
  }

  public final long incrementAndGet() {
    return ++value;
  }

  public final long decrementAndGet() {
    return --value;
  }

  public final long addAndGet(long delta) {
    value += delta;
    return value;
  }

  @Override public String toString() {
    return Long.toString(value);
  }

  public int intValue() {
    return (int) value;
  }

  public long longValue() {
    return value;
  }

  public float floatValue() {
    return (float) value;
  }

  public double doubleValue() {
    return (double) value;
  }
}

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