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package java.util.function;

import java.util.Objects;


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). 
See Also:
Since:1.8
/**
 * Represents a predicate (boolean-valued function) of one {@code double}-valued
 * argument. This is the {@code double}-consuming primitive type specialization
 * of {@link Predicate}.
 *
 * <p>This is a <a href="package-summary.html">functional interface</a>
 * whose functional method is {@link #test(double)}.
 *
 * @see Predicate
 * @since 1.8
 */
@FunctionalInterface
public interface DoublePredicate {

    
Evaluates this predicate on the given argument.

Params:
  • value – the input argument
Returns:true if the input argument matches the predicate, otherwise false
/**
     * Evaluates this predicate on the given argument.
     *
     * @param value the input argument
     * @return {@code true} if the input argument matches the predicate,
     * otherwise {@code false}
     */
    boolean test(double value);

    
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. 
Params:
  • other – a predicate that will be logically-ANDed with this
             predicate
Throws:
Returns:a composed predicate that represents the short-circuiting logical AND of this predicate and the other predicate
/**
     * 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 {@code false}, then the {@code other}
     * predicate is not evaluated.
     *
     * <p>Any exceptions thrown during evaluation of either predicate are relayed
     * to the caller; if evaluation of this predicate throws an exception, the
     * {@code other} predicate will not be evaluated.
     *
     * @param other a predicate that will be logically-ANDed with this
     *              predicate
     * @return a composed predicate that represents the short-circuiting logical
     * AND of this predicate and the {@code other} predicate
     * @throws NullPointerException if other is null
     */
    default DoublePredicate and(DoublePredicate other) {
        Objects.requireNonNull(other);
        return (value) -> test(value) && other.test(value);
    }

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

Returns:a predicate that represents the logical negation of this
predicate
/**
     * Returns a predicate that represents the logical negation of this
     * predicate.
     *
     * @return a predicate that represents the logical negation of this
     * predicate
     */
    default DoublePredicate negate() {
        return (value) -> !test(value);
    }

    
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. 
Params:
  • other – a predicate that will be logically-ORed with this
             predicate
Throws:
Returns:a composed predicate that represents the short-circuiting logical OR of this predicate and the other predicate
/**
     * 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 {@code true}, then the {@code other}
     * predicate is not evaluated.
     *
     * <p>Any exceptions thrown during evaluation of either predicate are relayed
     * to the caller; if evaluation of this predicate throws an exception, the
     * {@code other} predicate will not be evaluated.
     *
     * @param other a predicate that will be logically-ORed with this
     *              predicate
     * @return a composed predicate that represents the short-circuiting logical
     * OR of this predicate and the {@code other} predicate
     * @throws NullPointerException if other is null
     */
    default DoublePredicate or(DoublePredicate other) {
        Objects.requireNonNull(other);
        return (value) -> test(value) || other.test(value);
    }
}