001/*
002 * Copyright (C) 2013 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.util.concurrent;
018
019import com.google.common.annotations.Beta;
020import com.google.common.annotations.GwtCompatible;
021
022/**
023 * Static utility methods pertaining to the {@link Runnable} interface.
024 *
025 * @since 16.0
026 */
027@Beta
028@GwtCompatible
029public final class Runnables {
030
031  private static final Runnable EMPTY_RUNNABLE = new Runnable() {
032    @Override
033    public void run() {
034    }
035  };
036
037  /**
038   * Returns a {@link Runnable} instance that does nothing when run.
039   */
040  public static Runnable doNothing() {
041    return EMPTY_RUNNABLE;
042  }
043
044  private Runnables() {
045  }
046}