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Java Captain
Java Captain
Apr 20, 2019 · Fundamentals

Understanding Java Lambda Expressions, Functional Interfaces, Streams, and Optional

This article explains how Java 8 lambda expressions let you assign blocks of code to variables, how they are tied to functional interfaces, and demonstrates step‑by‑step simplifications using built‑in functional interfaces, forEach, stream(), method references, and Optional for elegant null handling.

Functional InterfaceJavaJava 8
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Understanding Java Lambda Expressions, Functional Interfaces, Streams, and Optional