Summary

Report that the method throws a NullPointerException and specify that the method calls the negate method of target argument.

Problem

The current Javadoc does not indicate that the method explicitly checks for a null target. Also, the method should indicate that the target Predicate's negate method is called to produce the result.

Solution

Update the Javadoc.

Specification

/**
 * Returns a predicate that is the negation of the supplied predicate.
 * This is accomplished by returning result of the calling
 * {@code target.negate()}.
 *
 * @param <T>     the type of arguments to the specified predicate
 * @param target  predicate to negate
 *
 * @return a predicate that negates the results of the supplied
 *         predicate
 *
 * @throws NullPointerException if target is null
 *
 * @since 11
 */
@SuppressWarnings("unchecked")
static <T> Predicate<T> not(Predicate<? super T> target) {
    Objects.requireNonNull(target);
    return (Predicate<T>)target.negate();
}