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Java 8 Tutorial

Last Updated: June 14, 2023
By: javahandson
Series

Java 8 introduced major changes that made Java programming more expressive and functional. This section covers important features such as lambda expressions, functional interfaces, method references, Stream API, collectors, Optional, and the new Date and Time API. You’ll learn how these features reduce boilerplate code and make data processing easier. The tutorials also explain practical use cases and common interview questions related to Java 8. This section is especially useful because Java 8 concepts are still widely used in modern Java applications.

lambda expressions and functional interfaces

Lambda expression in Java 8
Custom Functional Interface in Java: @FunctionalInterface Explained
Predefined Functional interfaces
Predefined Functional interfaces with 2 input arguments
Function Composition in Java 8: andThen, compose, and Predicate Chaining
Method reference in Java 8

passing code with behavior parameterization

Passing code as a parameter in Java 8

working with streams

Introduction to Streams in Java 8: Creating Streams from Values, Arrays and Collections
Filtering in Streams
mapping in Java 8 streams
flatmap in Java 8 streams
Finding and Matching in Java 8
Sorting Streams in Java 8 – sorted, Comparator.comparing, thenComparing, reversed
Reduce Method in Java 8 Streams – identity, accumulator and combiner

collecting data with streams

Introduction to the Collectors class
Java 8 Stream collect to List, Set, and Map: toList, toSet, and toMap
Summing method in Collectors API
Java 8 Summarizing Methods with Examples
joining and counting collectors in Java 8
Partitioning in Java 8
Grouping in Java 8
Java 8 custom collectors: mapping(), collectingAndThen() & Collector.of

Optional

Java Optional: An Introduction and Why It Exists

Date & Time API

Java 8 Date and Time API: A Beginner’s Guide to java.time
LocalDate vs LocalDateTime in Java: Clear Guide with Examples
Period vs Duration in Java: The Difference, With Examples

parallel data processing and performance

ForkJoinPool in Java
Parallel stream in Java 8

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JavaHandsOn is a learning website. Here I will share knowledge related to Java and its frameworks like Spring, Hibernate, Spring Boot, etc. We will learn every topic using some basic examples. I hope you get in-depth knowledge of Java here and be a proficient developer.

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