Here you can find the source of roundToInt(double d)
public static int roundToInt(double d)
//package com.java2s; /* Copyright (c) 2015 University of Massachusetts * //from ww w. j av a 2 s . c o m * 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. */ public class Main { public static int roundToInt(double d) { return (int) Math.round(d); } }