Predicate

External

• https://docs.oracle.com/javase/10/docs/api/java/util/function/Predicate.html

Internal

• Java 8 Lambda Expressions

Overview

A predicate is a function that evaluates an argument and returns a boolean.

@FunctionalInterface
public interface Predicate<T> {

    boolean test​(T t);

    ...
}

Primitive Type Predicates

• IntPredicate
• LongPredicate
• DoublePredicate

Composition Methods

The precedence of methods and() and or() is managed from left to right using their positions in the chain.

• negate()
• and(Predicate)
• or(Predicate)