Java Tutorials

Welcome to the series of Java Tutorials. In this series, I will explain some of the fundamental and advanced concepts of Java Programming Language. Read these tutorials to learn about various features in Java and find code references. Any Programming Language is mostly about writing code. No wonder you find plenty of Code Examples in the tutorials.

Java Persistence API

Hands-on Spring Data JPA

Java Persistence API Guide

What are JPA, Spring Data and Spring Data JPA

Spring Boot with Spring Data JPA

Spring Data JPA Composite Key with @EmbeddedId

Spring Data JPA find by @EmbeddedId Partially

Spring Data JPA – Query Methods

Wildcard Queries with Spring Data JPA

Pagination and Sorting with Spring Data JPA

Java Collections

Introduction To Java Collections

Introduction to Java Collections Map Interface

Introduction to HashMap in Java with Examples

How to Initialize a HashMap Inline in Java

Examples of Converting List to Map using Streams

Introduction to Java Collections Set Interface

How to Initialize a HashSet Inline in Java

Introduction to Java HashSets With Examples

Introduction to Java LinkedHashSet With Examples

Introduction to Java TreeSets With Examples

How to Initialize a List Inline in Java

Convert List to Concatenated String with Delimiter in Java

How to Partition List in Multiple Sublists in Java

How to Remove Duplicate Elements from a List in Java

How to Merge Multiple Collections in Java

Mapping Lists of different elements types using Model Mapper

Arrays.asList(array) vs new ArrayList(Arrays.asList(array))

Examples of Conversion Between Array and Set in Java

Examples of Conversion Between List and Set in Java

Examples of Conversion Between Array and List in Java

Converting Between Array of Primitives to Array of Objects

Filtering a Map in Java

Merging two Maps in Java

Sort HashMap by Value or Key in Java

Comparator with Java Lambda Expression Examples

Sorting Collections with Java Streams API

Examples of Adding an Element to a Java Stream

Count and Remove Duplicates from a Java Stream

Negate a Java Predicate and Method Reference

Java Streams filter() with Lambda Expressions

Chaining Multiple Java Predicates Together

Java HashSet Sorting Examples

Sorting Collection of Objects by Multiple Fields in Java

Finding the Difference Between Two Java Sets

Check if Two Java Lists are Equal

Asserting Java Lists for Equality Ignoring the Order

Finding the Differences Between Two Java Lists

Flattening Nested Lists in Java

Case-Insensitive Search in Java ArrayLists

Java 8

Understanding Java 8 Streams API

Java 8 Streams – Laziness and Performance

Java 8 Streams – Intermediate Operations

Java 8 Streams – Terminal Operations

Java 8 Streams – Stream Collectors

Write Java Streams Custom Collector

JSR 310 Part 1: Existing Date and Time API

JSR 310 Part 2: Joda Time API

JSR 310 Part 3: Java 8 Date and Time API

‘At First Sight’ With Closures in Java

Java 8 Collections API Enhancements

Default Methods in Java Interfaces

Static Methods in Java Interfaces

General

Convert Java Objects To JSON with Jackson API

Read JSON Strings into Java Objects with Jackson API

Convert Java Objects To JSON with GSON API

Read JSON Strings into Java Objects with Gson API

Stream Large JSON Files to Parse Them

How to read JSON File from a URL in Java

Create Immutable Value Objects using Java Record Classes

Introduction to Java Sealed Classes and Interfaces

Introduction to Java Text Blocks

How to generate Random Numbers (Long, Float, Integer, Double) in Java

List Files and Subdirectories from a Directory in Java

How to Convert InputStream to String

How to Convert InputStream to Byte Array

How to Convert InputStream to File

How to Write InputStream to OutputStream

Read a File from the Resources Folder in Java

Read a File from a URL in Java

Check File Exists and Check File Permissions in Java

Java Large Files – Efficient Processing

Introduction to Java Preferences API

Servlet 3.0 Web Fragments and other Features

Java Basics

Introduction to Java

Introduction to Java Virtual Machine (JVM)

What are JVM, JDK and JRE

Introduction to Fork Join Framework

Introduction to Java Interfaces

Introduction to Java Abstract Classes

Interfaces In Java