Here you can find the source of getExpirationMillis(long now, Duration duration)
public static long getExpirationMillis(long now, Duration duration)
//package com.java2s; /*/* ww w . j a v a 2 s .c o m*/ * Copyright Terracotta, Inc. * * 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.time.Duration; public class Main { public static long getExpirationMillis(long now, Duration duration) { try { return duration.plusMillis(now).toMillis(); } catch (ArithmeticException e) { return Long.MAX_VALUE; } } }