org.cactoos.scalar

Class SumOfLong

java.lang.Object

org.cactoos.scalar.SumOfLong

All Implemented Interfaces:

Scalar<Long>

public final class SumOfLong
extends Object
implements Scalar<Long>

Long Scalar which sums up the values of other Scalars of the same type

Here is how you can use it to summarize numbers:

 long sum = new SumOfLongScalar(() -> 1,() -> 2, () -> 3).value();
 

This class implements Scalar, which throws a checked Exception. Despite that this class does NOT throw a checked exception.

There is no thread-safety guarantee.

Since:

0.30

Constructor Summary

Constructors

Constructor and Description
SumOfLong(Scalar<Long>... src) Ctor.

Method Summary

Modifier and Type	Method and Description
Long	value() Convert it to the value.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SumOfLong

@SafeVarargs
public SumOfLong(Scalar<Long>... src)

Ctor.

Parameters:

src - Varargs of Scalar to sum up values from

Since:

0.30

Method Detail

value

public Long value()

Description copied from interface: Scalar

Convert it to the value.

Specified by:

value in interface Scalar<Long>

Returns:

The value