Java Number Sum sumOr0(Object a, Object b)

Description

sum Or

License

Apache License

Declaration

private static Number sumOr0(Object a, Object b) 

Method Source Code

//package com.java2s;
/*/*  w  w  w.  j  av  a 2  s  . co  m*/
 * 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 {
    private static Number sumOr0(Object a, Object b) {
        if (isValidNumber(a) && isValidNumber(b)) {
            if (a instanceof Long || a instanceof Integer) {
                return ((Number) a).longValue() + ((Number) b).longValue();
            } else {
                return ((Number) a).doubleValue() + ((Number) b).doubleValue();
            }
        }
        return 0;
    }

    /**
     * Returns true if x is a number that is not NaN or Infinity, false otherwise
     */
    private static boolean isValidNumber(Object x) {
        return x != null && x instanceof Number && !Double.isNaN(((Number) x).doubleValue())
                && !Double.isInfinite(((Number) x).doubleValue());
    }
}

Related

1. sumMinMax(int a, int b)
2. sumNforOddIndices(long n)
3. sumOfCollectionDouble(Iterable doubleIterable)
4. sumOfDigits(long n)
5. sumOfProperDivisors(long num)
6. sumOverOne(final int n)
7. sumPossitiveIntegerSequencePartial(int start, int end)
8. sumUp(final Iterable values)