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.GwtCompatible;
018
019/**
020 * Static utility methods pertaining to the {@link Runnable} interface.
021 *
022 * @since 16.0
023 */
024@GwtCompatible
025@ElementTypesAreNonnullByDefault
026public final class Runnables {
027
028  private static final Runnable EMPTY_RUNNABLE =
029      new Runnable() {
030        @Override
031        public void run() {}
032      };
033
034  /** Returns a {@link Runnable} instance that does nothing when run. */
035  public static Runnable doNothing() {
036    return EMPTY_RUNNABLE;
037  }
038
039  private Runnables() {}
040}