Java Number Multiply multiply(final long a, final long b)

Description

multiply

License

Apache License

Declaration

public static long multiply(final long a, final long b) 

Method Source Code

//package com.java2s;
/*//from   w ww .j  a  va 2 s . c om
 * @(#)$Id: NumberUtils.java 3619 2008-03-26 07:23:03Z yui $
 *
 * Copyright 2006-2008 Makoto YUI
 *
 * 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.
 * 
 * Contributors:
 *     Makoto YUI - initial implementation
 */

public class Main {
    public static long multiply(final long a, final long b) {
        final long product = a * b;
        final long b2 = product / a;
        if (b2 != b) {
            throw new ArithmeticException("long overflows: " + a + " * " + b + " = " + product);
        }
        return product;
    }
}

Related

1. multiply(Double a, Double b)
2. Multiply(double px0, double py0, double px1, double py1, double px2, double py2)
3. multiply(final long x, final long y)
4. multiply(int a, int b)
5. multiply(int x, int y)
6. multiply(Number a, Number b)