Computes the floored division dividend/divisor which is useful when dividing potentially negative numbers into bins. - Java java.lang

Java examples for java.lang:Math Calculation

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Description

Computes the floored division dividend/divisor which is useful when dividing potentially negative numbers into bins.

Demo Code

// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
//package com.java2s;

public class Main {
    /**//from   w w  w .  j av a2 s . c  o m
     * Computes the floored division <code>dividend/divisor</code> which
     * is useful when dividing potentially negative numbers into bins.
     *
     * <p> For example, the following numbers floorDiv 10 are:
     * <pre>
     * -15 -10 -8 -2 0 2 8 10 15
     *  -2  -1 -1 -1 0 0 0  1  1
     * </pre>
     */
    public static int floorDiv(int dividend, int divisor) {
        return ((dividend >= 0) == (divisor >= 0)) ? dividend / divisor
                : (divisor >= 0 ? (dividend - divisor + 1) / divisor
                        : (dividend - divisor - 1) / divisor);
    }
}

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