Java Utililty Methods Collection Sum

List of utility methods to do Collection Sum

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Description

The list of methods to do Collection Sum are organized into topic(s).

Method

intsum(final Collection values)
Sums the values in the collection. 
int sum = 0;
for (Integer operand : values) {
    if (Integer.MAX_VALUE - sum < operand) {
        throw new Exception("Overflow.");
    sum += operand;
return sum;
...
DoublesumDouble(Collection collection)
sum Double 
Double result = 0.0;
for (Double n : collection) {
    result += n;
return result;
StringsummarizeCollection(Collection collection, String collectionType, String elementType)
summarize Collection 
if (collection == null) {
    return "null";
return collectionType + "<" + elementType + ">(size=" + collection.size() + ")";
DoublesumNumberCollection(Collection numbers)
sum Number Collection 
double sum = 0.0;
for (T t : numbers) {
    sum += t.doubleValue();
return sum;