Here you can find the source of toSeconds(long value, TimeUnit unit)
public static double toSeconds(long value, TimeUnit unit)
//package com.java2s; /*/*from w ww . j a va2s.c om*/ * Copyright 2012 the original author or authors. * * 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 static double toSeconds(long value, TimeUnit unit) { if (unit.ordinal() >= TimeUnit.SECONDS.ordinal()) { return TimeUnit.SECONDS.convert(value, unit); } return value / (double) unit.convert(1, TimeUnit.SECONDS); } }