Here you can find the source of waitFor(long period)
public final static boolean waitFor(long period)
//package com.java2s; /*/* w ww. j av a2 s . c om*/ * Copyright Bruce Liang (ldcsaa@gmail.com) * * Version : Log-Cutter 2.0.2 * Author : Bruce Liang * Website : http://www.jessma.org * Project : https://github.com/ldcsaa * Blog : http://www.cnblogs.com/ldcsaa * WeiBo : http://weibo.com/u/1402935851 * QQ Group : 75375912 * * 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. */ import java.util.concurrent.TimeUnit; public class Main { public final static boolean waitFor(long period) { if (period > 0) { try { Thread.sleep(period); } catch (Exception e) { return false; } } else Thread.yield(); return true; } public final static boolean waitFor(long period, TimeUnit unit) { return waitFor(unit.toMillis(period)); } }