A Guide to Java 8

Java 8 Tutorial is a practical guide to the major language and API additions introduced with Java 8. It teaches new concepts through short, heavily commented code examples instead of long theoretical explanations. Topics include default interface methods, lambda expressions, functional interfaces, method references, and constructor references. The guide also covers built-in functional types such as predicates, functions, suppliers, consumers, and comparators. Later sections explain Optional, streams, parallel streams, Map enhancements, the new Date and Time API, and annotations. Examples demonstrate filtering, mapping, sorting, reduction, and other common functional programming patterns. The repository is intended as a compact reference for developers moving from earlier Java versions to Java 8.