Interface Predicate<T>

Type Parameters:

T - the type of the input to the predicate

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 Predicate<T>

Since:

1.8

Methods

test

boolean test(T t)

Evaluates this predicate on the given argument.

Parameters:

t - the input argument

Returns:

true if the input argument matches the predicate, otherwise false

and

default Predicate<T> and(Predicate<? super T> other)

Parameters:

other - a predicate that will be logically-ANDed with this predicate

Returns:

a composed predicate that represents the short-circuiting logical AND of this predicate and the other predicate

Throws:

NullPointerException - if other is null

negate

default Predicate<T> negate()

Returns a predicate that represents the logical negation of this predicate.

Returns:

a predicate that represents the logical negation of this predicate

or

default Predicate<T> or(Predicate<? super T> other)

Parameters:

other - a predicate that will be logically-ORed with this predicate

Returns:

a composed predicate that represents the short-circuiting logical OR of this predicate and the other predicate

Throws:

NullPointerException - if other is null

isEqual

static <T> Predicate<T> isEqual(Object targetRef)

Returns a predicate that tests if two arguments are equal according to Objects.equals(Object, Object).

Type Parameters:

T - the type of arguments to the predicate

Parameters:

targetRef - the object reference with which to compare for equality, which may be null

Returns:

a predicate that tests if two arguments are equal according to Objects.equals(Object, Object)