Predicate - JRE Emulation | JRE Emulation
public interface

Predicate

java.util.function.Predicate<T>

Class Overview

Represents a predicate (boolean-valued function) of one argument.

This is a functional interface whose functional method is test(Object).

Summary

Public Methods
abstract Predicate<T> and(Predicate<? super T> other)
Returns a composed predicate that represents a short-circuiting logical AND of this predicate and another.
abstract static <T> Predicate<T> isEqual(Object targetRef)
Returns a predicate that tests if two arguments are equal according to equals(Object, Object).
abstract Predicate<T> negate()
Returns a predicate that represents the logical negation of this predicate.
abstract Predicate<T> or(Predicate<? super T> other)
Returns a composed predicate that represents a short-circuiting logical OR of this predicate and another.
abstract boolean test(T t)
Evaluates this predicate on the given argument.

Public Methods

public abstract Predicate<T> and (Predicate<? super T> other)

Returns a composed predicate that represents a short-circuiting logical AND of this predicate and another. When evaluating the composed predicate, if this predicate is false, then the other predicate is not evaluated.

Any exceptions thrown during evaluation of either predicate are relayed to the caller; if evaluation of this predicate throws an exception, the other predicate will not be evaluated.

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

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

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

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

public abstract 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

public abstract Predicate<T> or (Predicate<? super T> other)

Returns a composed predicate that represents a short-circuiting logical OR of this predicate and another. When evaluating the composed predicate, if this predicate is true, then the other predicate is not evaluated.

Any exceptions thrown during evaluation of either predicate are relayed to the caller; if evaluation of this predicate throws an exception, the other predicate will not be evaluated.

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

public abstract 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