Here you can find the source of ceil(final double num)
public static int ceil(final double num)
//package com.java2s; /*/* ww w .j a va 2 s. c o m*/ * Ipsum is a rapid development API for Minecraft, developer by Relicum * Copyright (C) 2014. Chris Lutte * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ public class Main { public static int ceil(final double num) { final int floor = (int) num; return floor == num ? floor : floor + (int) (~Double.doubleToRawLongBits(num) >>> 63); } }