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Showing content from https://docs.oracle.com/javase/8/docs/api/java/util/function/BinaryOperator.html below:

BinaryOperator (Java Platform SE 8 )

• Type Parameters:

  T - the type of the operands and result of the operator

  All Superinterfaces:

  BiFunction<T,T,T>

  Functional Interface:

  This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

  
  

  @FunctionalInterface
  public interface BinaryOperator<T>
  extends BiFunction<T,T,T>

  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 BiFunction.apply(Object, Object).

  Since:

  1.8

  See Also:

  BiFunction, UnaryOperator

• • Method Detail
    • minBy

      static <T> BinaryOperator<T> minBy(Comparator<? super T> comparator)

      Returns a

      BinaryOperator

      which returns the lesser of two elements according to the specified

      Comparator

      .

      Type Parameters:

      T - the type of the input arguments of the comparator

      Parameters:

      comparator - a Comparator for comparing the two values

      Returns:

      a BinaryOperator which returns the lesser of its operands, according to the supplied Comparator

      Throws:

      NullPointerException - if the argument is null

    • maxBy

      static <T> BinaryOperator<T> maxBy(Comparator<? super T> comparator)

      Returns a

      BinaryOperator

      which returns the greater of two elements according to the specified

      Comparator

      .

      Type Parameters:

      T - the type of the input arguments of the comparator

      Parameters:

      comparator - a Comparator for comparing the two values

      Returns:

      a BinaryOperator which returns the greater of its operands, according to the supplied Comparator

      Throws:

      NullPointerException - if the argument is null

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