@FunctionalInterface @GwtCompatible public interface Predicate<T> extends Predicate<T>
java.util.function.Predicate. Determines a true or false value for a given input.
As this interface extends
java.util.function.Predicate, an instance of this type may
be used as a
Predicate directly. To use a
java.util.function.Predicate where a
com.google.common.base.Predicate is expected, use the method reference
This interface is now a legacy type. Use
java.util.function.Predicate (or the
appropriate primitive specialization such as
IntPredicate) instead whenever possible.
Otherwise, at least reduce explicit dependencies on this type by using lambda expressions
or method references instead of classes, leaving your code easier to migrate in the future.
Predicates class provides common predicates and related utilities.
See the Guava User Guide article on the use of
|Modifier and Type||Method and Description|
Returns the result of applying this predicate to
Indicates whether another object is equal to this predicate.
Evaluates this predicate on the given argument.
@CanIgnoreReturnValue boolean apply(@NullableDecl T input)
input(Java 8 users, see notes in the class documentation above). This method is generally expected, but not absolutely required, to have the following properties:
(a, b)implies that
predicate.apply(a) == predicate.apply(b)).
inputis null and this predicate does not accept null arguments
boolean equals(@NullableDecl Object object)
Most implementations will have no reason to override the behavior of
However, an implementation may also choose to return
object is a
Predicate that it considers interchangeable with this one. "Interchangeable"
typically means that
this.apply(t) == that.apply(t) for all
t of type
T). Note that a
false result from this method does not imply that the
predicates are known not to be interchangeable.
default boolean test(@NullableDecl T input)
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