Java tutorial
//package com.java2s; /* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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. */ import java.lang.Thread.State; public class Main { /** * Determines whether the specified Thread is in a waiting state, guarding against null Object references * <p/> * @param thread the Thread to access it's state. * @return a boolean value indicating whether the Thread is in a waiting state. If the Thread Object reference * is null, then this method return false, as no Thread is clearly not waiting for anything. * @see java.lang.Thread#getState() * @see java.lang.Thread.State#WAITING */ public static boolean isWaiting(final Thread thread) { return (thread != null && thread.getState().equals(State.WAITING)); } }