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. */ public class Main { /** * Causes the current Thread to sleep for the specified number of milliseconds. If the current Thread is interrupted * during sleep, the interrupt flag on the current Thread will remain set and the duration, in milliseconds, of completed sleep is returned. * <p/> * @param milliseconds an integer value specifying the number of milliseconds the current Thread should sleep. * @return a long value indicating duration in milliseconds of completed sleep by the current Thread. * @see java.lang.System#nanoTime() * @see java.lang.Thread#sleep(long) */ public static long sleep(final long milliseconds) { final long t0 = System.nanoTime(); try { Thread.sleep(milliseconds); } catch (InterruptedException ignore) { Thread.currentThread().interrupt(); } return (System.nanoTime() - t0) / 1000; } /** * Interrupts the specified Thread, guarding against null. * <p/> * @param thread the Thread to interrupt. * @see java.lang.Thread#interrupt() */ public static void interrupt(final Thread thread) { if (thread != null) { thread.interrupt(); } } }