Java tutorial
//package com.java2s; /*BEGIN_COPYRIGHT_BLOCK* PLT Utilities BSD License Copyright (c) 2007-2010 JavaPLT group at Rice University All rights reserved. Developed by: Java Programming Languages Team Rice University http://www.cs.rice.edu/~javaplt/ Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. - Neither the name of the JavaPLT group, Rice University, nor the names of the library's contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *END_COPYRIGHT_BLOCK*/ import java.util.concurrent.TimeoutException; public class Main { /** * If the given time (based on {@link System#currentTimeMillis}) has passed, throw a TimeoutException. * Otherwise, invoke {@link Object#wait(long)} on the given object, which may return due to * a {@code notify()} call, the timeout being reached, or a spurious wake-up. To distinguish between * these possibilities, clients should wrap this call in a while loop: * {@code long t = futureTimeMillis(...); while (!condition) waitUntilMillis(lock, t);} * This loop either completes if the condition is satisfied or throws an appropriate exception * due to an interrupt or timeout. * @param obj Object whose {@code wait()} method will be invoked. Must be locked by the current thread. * @param futureTime A millisecond time value based on {@code System.currentTimeMillis()} after which * this method should no longer invoke {@code obj.wait()}. * @throws InterruptedException If the wait is interrupted. * @throws TimeoutException If, at invocation time, {@code futureTime} is in the past. * @see #futureTimeMillis */ public static void waitUntilMillis(Object obj, long futureTime) throws InterruptedException, TimeoutException { long delta = futureTime - System.currentTimeMillis(); if (delta > 0) { obj.wait(delta); } else { throw new TimeoutException(); } } }