Here you can find the source of toNanos(long timeout, TimeUnit unit)
static long toNanos(long timeout, TimeUnit unit)
//package com.java2s; /*/*from w w w . j a va 2 s .co m*/ * Copyright 2011-2015 Cojen.org * * 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 { static long toNanos(long timeout, TimeUnit unit) { return timeout < 0 ? -1 : (timeout == 0 ? 0 : (((timeout = unit.toNanos(timeout)) < 0) ? 0 : timeout)); } }