Functional Programming In Java: How Functional ... -

Shorthand syntax ( Class::method ) for lambda expressions that call an existing method by name. Functional Interfaces in Java - DZone

A container object used to represent the presence or absence of a value, helping to avoid NullPointerExceptions . Functional Programming in Java: How functional ...

Interfaces with exactly one abstract method (e.g., Predicate , Consumer , Function , Supplier ) that serve as target types for lambdas. Shorthand syntax ( Class::method ) for lambda expressions

Anonymous functions used to provide a concise implementation of a single method in a functional interface. Functional Programming in Java: How functional ...

: Encouraging immutable data structures ensures that once an object is created, its state cannot change. This reduces bugs related to unintended state mutations and makes code easier to test and reason about.