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

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rev 6189 : 8004015: Add Extends and deaults for basic functional interface types
Summary: Adds the appropriate extends and default methods for  core functional interfaces used by the JSR335 libraries.
Reviewed-by: duke

*** 26,40 **** /** * Apply a function to the input object yielding an appropriate {@code int} * value; this is the {@code int}-bearing specialization for {@link Function}. * * @param <T> the type of input objects to the function * * @since 1.8 */ ! public interface IntFunction<T> { /** * Apply a function to the input object yielding an appropriate {@code int} * value. * --- 26,55 ---- /** * Apply a function to the input object yielding an appropriate {@code int} * value; this is the {@code int}-bearing specialization for {@link Function}. * + * <p>When used as a {@code Function} the default {@code apply} implementation + * provided by this interface neither accepts null parameters nor does it return + * null results. + * * @param <T> the type of input objects to the function * * @since 1.8 */ ! public interface IntFunction<T> extends Function<T,Integer> { ! ! /** ! * {@inheritDoc} ! * ! * @param t {@inheritDoc}, must be non-null ! * @return {@inheritDoc}, always non-null ! */ ! @Override ! public default Integer apply(T t) { ! return applyAsInt(t); ! } /** * Apply a function to the input object yielding an appropriate {@code int} * value. *