DoubleCollection

sum

Signature

OptionalDouble sum()

Sums non-null Double values if they exist. Returns an empty optional if no such values exist.

Example

OptionalDouble total = new DoubleCollection(new List<Double>){1, 2, 3}).sum(); // 6

max

Signature

OptionalDouble max()

Returns greatest non-null Double value if it exists. Returns an empty optional if no such values exist.

Example

OptionalDouble max = new DoubleCollection(new List<Double>){1, 2, 3}).max(); // 3

min

Signature

OptionalDouble min()

Returns smallest non-null Double value if it exists. Returns an empty optional if no such values exist.

Example

OptionalDouble min = new DoubleCollection(new List<Double>){1, 2, 3}).min(); // 1

average

Averages non-null Double values if they exist. Returns an empty optional if no such values exist.

Signature

OptionalDouble average()

Example

OptionalDouble average = new DoubleCollection(new List<Double>){1, 2, 3}).average(); // 2

filter

Filters all values satisfying the predicate into a new DoubleCollection view

Signature

DoubleCollection filter(ObjectPredicate predicate)