Java List Sum getSum(List numList)

Description

get Sum

License

Apache License

Declaration

public static long getSum(List numList) 

Method Source Code

//package com.java2s;
/**/*from  ww  w.j  a v a  2s  .c om*/
 * 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.
 */

import java.util.Iterator;
import java.util.List;

public class Main {
    public static long getSum(List numList) {
        long sum = 0;
        if (numList != null) {
            for (Iterator i = numList.iterator(); i.hasNext();) {
                sum += ((Long) i.next()).longValue();
            }
        } else {
            sum = -1;
        }
        return sum;
    }
}

Related

1. calculateSum(List valueList)
2. checkSum(List stringList)
3. getListSum(List list)
4. getResidualSumOfSquares(List response, List samples, int ta)
5. getSum(final List values)
6. getSum(List values)
7. getSum(List longList)
8. getSumOfInts(List ints)
9. getSumOfPositiveDoubles(List scores)