public abstract interface BinaryOperator<T>
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Represents an operation upon two operands of the same type, producing a result of the same type as the operands. This is a specialization of BiFunction for the case where the operands and the result are all of the same type.

This is a functional interface whose functional method is apply(Object, Object).

extends BiFunction<T, T, T>

<T>    the type of the operands and result of the operator

See also:
BiFunction, UnaryOperator

Since:  1.8