程序包 java.util.function

接口 DoublePredicate

函数接口:

这是一个函数接口, 因此可用作 lambda 表达式或方法引用的赋值目标。

@FunctionalInterface
public interface DoublePredicate

Represents a predicate (boolean-valued function) of one double-valued argument. This is the double-consuming primitive type specialization of Predicate.

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

从以下版本开始:

1.8

另请参阅:

Predicate

方法概要

限定符和类型	方法	说明
default DoublePredicate	and(DoublePredicate other)	Returns a composed predicate that represents a short-circuiting logical AND of this predicate and another.
default DoublePredicate	negate()	Returns a predicate that represents the logical negation of this predicate.
default DoublePredicate	or(DoublePredicate other)	Returns a composed predicate that represents a short-circuiting logical OR of this predicate and another.
boolean	test(double value)	Evaluates this predicate on the given argument.

方法详细资料

test

boolean test(double value)

Evaluates this predicate on the given argument.

参数:

value - the input argument

返回:

true if the input argument matches the predicate, otherwise false

and

default DoublePredicate and(DoublePredicate 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.

参数:

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

返回:

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

抛出:

NullPointerException - if other is null

negate

default DoublePredicate negate()

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

返回:

a predicate that represents the logical negation of this predicate

or

default DoublePredicate or(DoublePredicate 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.

参数:

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

返回:

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

抛出:

NullPointerException - if other is null