Java Number Round round(int x, int quantum)

Description

Returns nearest integer to x, divisible by quantum.

License

Apache License

Parameter

Parameter	Description
x	integer for quantization
quantum	integer, representing quantization

Return

computed nearest integer

Declaration

public static int round(int x, int quantum) 

Method Source Code

//package com.java2s;
/*//from www .  j ava  2s.com
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 {
    /**
     * Returns nearest integer to <code>x</code>, divisible by
     * <code>quantum</code>.
     *
     * @param x integer for quantization
     * @param quantum integer, representing quantization
     * @return computed nearest integer
     */
    public static int round(int x, int quantum) {
        int ceil = ceil(x, quantum);
        int floor = floor(x, quantum);
        return (ceil - x < x - floor) ? ceil : floor;
    }

    /**
     * Returns minimal possible integer, greater or equal than
     * <code>x</code>, divisible by <code>quantum</code>.
     *
     * @param x integer for quantization
     * @param quantum integer, representing quantization
     * @return computed nearest integer
     */
    public static int ceil(int x, int quantum) {
        int dx = (x < 0) || (x % quantum == 0) ? 0 : 1;
        return (x / quantum + dx) * quantum;
    }

    /**
     * Returns maximum possible integer, less or equal than
     * <code>oldValue</code>, divisible by <code>quantum</code>.
     *
     * @param x integer for quantization
     * @param quantum integer, representing quantization
     * @return computed nearest integer
     */
    public static int floor(int x, int quantum) {
        int dx = (x > 0) || (x % quantum == 0) ? 0 : -1;
        return (x / quantum + dx) * quantum;
    }
}

Related

1. round(int f)
2. round(int n)
3. round(int start, int boundary)
4. round(int t, int n, int decimals)
5. round(int top, int div2, int divisor)
6. round(Integer a)
7. round(Number number, Number unit)
8. Round(Object in)
9. round(String num, int length)