Predicate

All Superinterfaces:

java.util.function.Predicate<T>

All Known Implementing Classes:

BloomFilter, CharMatcher, Range

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
@GwtCompatible
public interface Predicate<T extends @Nullable java.lang.Object>
extends java.util.function.Predicate<T>
```
Legacy version of 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 predicate::test.
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.
The Predicates class provides common predicates and related utilities.
See the Guava User Guide article on the use of Predicate.

Since:

2.0

Author:

Kevin Bourrillion

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`boolean`	`apply(T input)`	Returns the result of applying this predicate to `input` (Java 8+ users, see notes in the class documentation above).
`boolean`	`equals(@Nullable java.lang.Object obj)`	Indicates whether another object is equal to this predicate.
`default boolean`	`test(T input)`

Methods inherited from interface java.util.function.Predicate
and, negate, or

- Method Detail
  - apply
```
boolean apply(T input)
```
    Returns the result of applying this predicate to 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:
    
    Its execution does not cause any observable side effects.
    The computation is consistent with equals; that is, Objects.equals(a, b) implies that predicate.apply(a) == predicate.apply(b)).
    Throws:
    
    java.lang.NullPointerException - if input is null and this predicate does not accept null arguments
  - equals
```
boolean equals(@Nullable java.lang.Object obj)
```
    Indicates whether another object is equal to this predicate.
    Warning: do not depend on the behavior of this method.
    Historically, Predicate instances in this library have implemented this method to recognize certain cases where distinct Predicate instances would in fact behave identically. However, as code migrates to java.util.function, that behavior will disappear. It is best not to depend on it.
    
    Overrides:
    
    equals in class java.lang.Object
  - test
```
default boolean test(T input)
```
    Specified by:
    
    test in interface java.util.function.Predicate<T extends @Nullable java.lang.Object>