001/*
002 * Copyright (C) 2013 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
005 * in compliance with the License. You may obtain a copy of the License at
006 *
007 * http://www.apache.org/licenses/LICENSE-2.0
008 *
009 * Unless required by applicable law or agreed to in writing, software distributed under the License
010 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
011 * or implied. See the License for the specific language governing permissions and limitations under
012 * the License.
013 */
014
015package com.google.common.util.concurrent;
016
017import com.google.common.annotations.Beta;
018import com.google.common.annotations.GwtCompatible;
019
020/**
021 * Static utility methods pertaining to the {@link Runnable} interface.
022 *
023 * @since 16.0
024 */
025@Beta
026@GwtCompatible
027public final class Runnables {
028
029  private static final Runnable EMPTY_RUNNABLE =
030      new Runnable() {
031        @Override
032        public void run() {}
033      };
034
035  /**
036   * Returns a {@link Runnable} instance that does nothing when run.
037   */
038  public static Runnable doNothing() {
039    return EMPTY_RUNNABLE;
040  }
041
042  private Runnables() {}
043}