Category · 702 articles

Backend Engineering

Java collections: choosing List, Set and Map in practice

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 005

Java collections: choosing List, Set and Map in practice

Expona Admin · Oct 27, 2026 · 8 min read

Java streams examples you will reuse daily: a deep dive

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 006

Java streams examples you will reuse daily: a deep dive

Expona Admin · Oct 27, 2026 · 8 min read

Collectors.groupingBy recipes: best practices explained

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 007

Collectors.groupingBy recipes: best practices explained

Expona Admin · Oct 27, 2026 · 6 min read

Java Optional done right: a hands-on guide for engineers

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 008

Java Optional done right: a hands-on guide for engineers

Expona Admin · Oct 27, 2026 · 7 min read

Sealed classes and pattern matching in Java & Spring Boot

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 009

Sealed classes and pattern matching in Java & Spring Boot

Expona Admin · Oct 27, 2026 · 8 min read

Checked vs unchecked exceptions in Java, explained simply

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 010

Checked vs unchecked exceptions in Java, explained simply

Expona Admin · Oct 27, 2026 · 7 min read

equals and hashCode: the contract — a step-by-step guide

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 011

equals and hashCode: the contract — a step-by-step guide

Expona Admin · Oct 27, 2026 · 9 min read

Immutability in Java: a practical Java & Spring Boot guide

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 012

Immutability in Java: a practical Java & Spring Boot guide

Expona Admin · Oct 27, 2026 · 8 min read

Java generics and wildcards: PECS — a step-by-step guide

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 013

Java generics and wildcards: PECS — a step-by-step guide

Expona Admin · Oct 27, 2026 · 9 min read

Virtual threads in Java 21: patterns, pitfalls and fixes

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 014

Virtual threads in Java 21: patterns, pitfalls and fixes

Expona Admin · Oct 27, 2026 · 8 min read

CompletableFuture basics: a hands-on guide for engineers

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 015

CompletableFuture basics: a hands-on guide for engineers

Expona Admin · Oct 27, 2026 · 7 min read

JVM memory explained: heap, stack and metaspace explained

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 016

JVM memory explained: heap, stack and metaspace explained

Expona Admin · Oct 27, 2026 · 8 min read

G1 vs ZGC: choosing a garbage collector, explained simply

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 017

G1 vs ZGC: choosing a garbage collector, explained simply

Expona Admin · Oct 27, 2026 · 7 min read

Reading a Java thread dump: patterns, pitfalls and fixes

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 018

Reading a Java thread dump: patterns, pitfalls and fixes

Expona Admin · Oct 27, 2026 · 6 min read

Java interview questions: strings and memory in practice

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 019

Java interview questions: strings and memory in practice

Expona Admin · Oct 27, 2026 · 7 min read

Java features worth learning in 2026: a practical guide

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 020

Java features worth learning in 2026: a practical guide

Expona Admin · Oct 27, 2026 · 8 min read

Spring vs Spring Boot: what is the difference explained

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 021

Spring vs Spring Boot: what is the difference explained

Expona Admin · Oct 27, 2026 · 6 min read

Spring Boot tutorial: your first REST API for production

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 022

Spring Boot tutorial: your first REST API for production

Expona Admin · Oct 27, 2026 · 8 min read

Structure Spring Boot projects by feature for production

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 023

Structure Spring Boot projects by feature for production

Expona Admin · Oct 27, 2026 · 8 min read

Spring bean scopes explained: what developers should know

JAVA, SPRING FRAMEWORK & SPRING BOOT · DAY 025

Spring bean scopes explained: what developers should know

Expona Admin · Oct 27, 2026 · 5 min read