Here you can find the source of execute(Runnable task)
public static void execute(Runnable task)
//package com.java2s; /*//ww w. ja va2 s .c o m * 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.util.concurrent.ExecutorService; import java.util.concurrent.Executors; public class Main { private static ExecutorService executor = Executors .newSingleThreadExecutor(); public static void execute(Runnable task) { if (executor.isTerminated() || executor.isShutdown()) { executor = Executors.newSingleThreadExecutor(); } executor.submit(task); } }