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Java example source code file (AtomicInteger.java)

This example Java source code file (AtomicInteger.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

atomicinteger, number, override, string

The AtomicInteger.java Java example source code

/*
 * Copyright (C) 2009 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 AtomicInteger}.  It's a thin wrapper
 * around the primitive {@code int}.
 *
 * @author Hayward Chan
 */
public class AtomicInteger extends Number implements java.io.Serializable {

  private int value;

  public AtomicInteger(int initialValue) {
    value = initialValue;
  }

  public AtomicInteger() {
  }

  public final int get() {
    return value;
  }

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

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

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

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

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

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

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

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

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

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

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

  public int intValue() {
    return value;
  }

  public long longValue() {
    return (long) value;
  }

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

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

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