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subject predicate?attribute?Predicate (Java Platform SE 8 )

电脑杂谈　 发布时间：2016-10-16 15:01:46　 来源：网络整理

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  • 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>

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

    This is a functional interface whose functional method is .

    Since: 1.8

  • Method Summary

    Modifier and Type Method and Description

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

    Returns a composed predicate that represents a short-circuiting logical AND of this predicate and another.

    static <T>predicate<T> (ObjecttargetRef)

    Returns a predicate that tests if two arguments are equal according to .

    default predicate<T> ()

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

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

    Returns a composed predicate that represents a short-circuiting logical OR of this predicate and another.

    boolean (Tt)

    Evaluates this predicate on the given argument.

  • Method Detail

  • test booleantest(Tt)

    Evaluates this predicate on the given argument.

    Parameters: t - the input argument Returns: true if the input argument matches the predicate, otherwise false
  • and defaultPredicate<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
  • negate defaultpredicate<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 defaultPredicate<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
  • isEqual static<T>predicate<T>isEqual(ObjecttargetRef)

    Returns a predicate that tests if two arguments are equal according to .

    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

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