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

BiFunction (Java Platform SE 8 )

• Type Parameters:

  T - the type of the first argument to the function

  U - the type of the second argument to the function

  R - the type of the result of the function

  All Known Subinterfaces:

  BinaryOperator<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 BiFunction<T,U,R>

  Since:

  1.8

  See Also:

  Function

• • Method Detail
    • apply

      R apply(T t,
              U u)

      Applies this function to the given arguments.

      Parameters:

      t - the first function argument

      u - the second function argument

      Returns:

      the function result

    • andThen

      default <V> BiFunction<T,U,V> andThen(Function<? super R,? extends V> after)

      Returns a composed function that first applies this function to its input, and then applies the after function to the result. If evaluation of either function throws an exception, it is relayed to the caller of the composed function.

      Type Parameters:

      V - the type of output of the after function, and of the composed function

      Parameters:

      after - the function to apply after this function is applied

      Returns:

      a composed function that first applies this function and then applies the after function

      Throws:

      NullPointerException - if after is null

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