anyMatch(p -> p.getGender().equals(Gender.FEMALE)) In other words, it answers the following question: Is there any element that meets this condition?The following example checks whether the list has any female: boolean anyFemale = listPersons.stream() Java Stream anyMatch operation exampleThe anyMatch() operation returns true if any element in the stream matches a provided predicate. Result: Does everyone use GMail? trueNote that if the stream is empty, the method returns true and the predicate is not evaluated. ('Does everyone use GMail? ' + useGMail) allMatch(p -> p.getEmail().endsWith('')) ('Are all persons male? ' + areAllMale) Result: Are all persons male? falseThe following example check if all people using GMail: boolean useGMail = listPersons.stream() allMatch(p -> p.getGender().equals(Gender.MALE))

Java Stream allMatch operation exampleThe allMatch()operation answers the question: Do all elements in the stream meet this condition? It returns true if and only if all elements match a provided predicate, otherwise return false.This is a short-circuiting terminal operation because the operation stops immediately if any unmatched element is found (just like short-circuit behavior of the AND operator).The following example checks if all persons are male: boolean areAllMale = listPersons.stream() Note that the following examples are still based on the sample data (a list of Person objects) in the tutorial Java Stream Aggregate Functions. They are eagerly executed, and a terminal operation is always the last operation in a Stream pipeline.

They can return a primitive value ( booleanor long), a concrete type ( Optional value object), or void (creating side effect).The reduce() operationRemember the following two key characteristics of terminal operations:

The terminal stream