src/share/classes/java/util/function/BiFunction.java

rev 7675 : 8019840: Spec updates for java.util.function
Reviewed-by: mduigou
Contributed-by: brian.goetz@oracle.com

*** 25,69 ****
  package java.util.function;
  
  import java.util.Objects;
  
  /**
!  * Apply a function to the input arguments, yielding an appropriate result. This
!  * is the two-arity specialization of {@link Function}. A function may
!  * variously provide a mapping between types, object instances or keys and
!  * values or any other form of transformation upon the input.
   *
!  * @param <T> the type of the first argument to the {@code apply} operation
!  * @param <U> the type of the second argument to the {@code apply} operation
!  * @param <R> the type of results returned by the {@code apply} operation
   *
   * @see Function
   * @since 1.8
   */
  @FunctionalInterface
  public interface BiFunction<T, U, R> {
  
      /**
!      * Compute the result of applying the function to the input arguments
       *
!      * @param t an input object
!      * @param u an input object
       * @return the function result
       */
      R apply(T t, U u);
  
      /**
!      * Returns a new function which applies this function followed by the
!      * provided function.  If either function throws an exception, it is relayed
!      * to the caller.
       *
!      * @param <V> Type of output objects to the combined function. May be the
!      * same type as {@code <T>}, {@code <U>} or {@code <R>}
!      * @param after An additional function to be applied after this function is
!      * applied
!      * @return A function which performs this function followed by the provided
!      * function
       * @throws NullPointerException if after is null
       */
      default <V> BiFunction<T, U, V> andThen(Function<? super R, ? extends V> after) {
          Objects.requireNonNull(after);
          return (T t, U u) -> after.apply(apply(t, u));
--- 25,70 ----
  package java.util.function;
  
  import java.util.Objects;
  
  /**
!  * Represents a function that accepts two arguments and produces a result.
!  * This is the two-arity specialization of {@link Function}.
   *
!  * <p>This is a <a href="package-summary.html">functional interface</a>
!  * whose functional method is {@link #apply(Object, Object)}.
!  *
!  * @param <T> the type of the first argument to the function
!  * @param <U> the type of the second argument to the function
!  * @param <R> the type of the result of the function
   *
   * @see Function
   * @since 1.8
   */
  @FunctionalInterface
  public interface BiFunction<T, U, R> {
  
      /**
!      * Applies this function to the given arguments.
       *
!      * @param t the first function argument
!      * @param u the second function argument
       * @return the function result
       */
      R apply(T t, U u);
  
      /**
!      * Returns a composed function that first applies this function to
!      * its input, and then applies the {@code after} function to the result.
!      * If evaluation of either function throws an exception, it is relayed to
!      * the caller of the composed function.
       *
!      * @param <V> the type of output of the {@code after} function, and of the
!      *           composed function
!      * @param after the function to apply after this function is applied
!      * @return a composed function that first applies this function and then
!      * applies the {@code after} function
       * @throws NullPointerException if after is null
       */
      default <V> BiFunction<T, U, V> andThen(Function<? super R, ? extends V> after) {
          Objects.requireNonNull(after);
          return (T t, U u) -> after.apply(apply(t, u));