Java tutorial
//package com.java2s; /* * Copyright (c) 2008-2015, Hazelcast, Inc. All Rights Reserved. * * Licensed 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. */ public class Main { private static final ThreadLocal<Long> THREAD_LOCAL = new ThreadLocal<Long>(); /** * Get the thread id * * @return the thread id */ public static long getThreadId() { final Long threadId = THREAD_LOCAL.get(); if (threadId != null) { return threadId; } return Thread.currentThread().getId(); } }