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}