A replacement for Math.abs , that never returns negative values. - Java java.lang

Java examples for java.lang:Math Value

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Description

A replacement for Math.abs , that never returns negative values.

Demo Code

/*/* ww  w .j a v a2  s .  c  o m*/
 * Copyright (c) 2008, Harald Kuhr
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name "TwelveMonkeys" nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
//package com.java2s;

public class Main {
    /**
     * A replacement for {@code Math.abs}, that never returns negative values.
     * {@code Math.abs(long)} does this for {@code Long.MIN_VALUE}.
     *
     * @see Math#abs(long)
     * @see Long#MIN_VALUE
     *
     * @param pNumber a number
     * @return the absolute value of {@code pNumber}
     *
     * @throws ArithmeticException if {@code pNumber == Long.MIN_VALUE}
     */
    public static long abs(final long pNumber) {
        if (pNumber == Long.MIN_VALUE) {
            throw new ArithmeticException(
                    "long overflow: 9223372036854775808");
        }

        return (pNumber < 0) ? -pNumber : pNumber;
    }

    /**
     * A replacement for {@code Math.abs}, that never returns negative values.
     * {@code Math.abs(int)} does this for {@code Integer.MIN_VALUE}.
     *
     * @see Math#abs(int)
     * @see Integer#MIN_VALUE
     *
     * @param pNumber a number
     * @return the absolute value of {@code pNumber}
     *
     * @throws ArithmeticException if {@code pNumber == Integer.MIN_VALUE}
     */
    public static int abs(final int pNumber) {
        if (pNumber == Integer.MIN_VALUE) {
            throw new ArithmeticException("int overflow: 2147483648");
        }

        return (pNumber < 0) ? -pNumber : pNumber;
    }
}

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