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Projects in Awesome Lists tagged with java21

A curated list of projects in awesome lists tagged with java21 .

https://github.com/alexandergarifullin/cfbot

Final project of the Java Programming Course – Advanced Level (middle) from IT University based on HSE – Perm

assertj codeforces-api githubaction-workflow gradle java21 junit5 liquibase lombok mockito postgresql spring-boot spring-data-jpa

Last synced: 04 Feb 2026

https://github.com/seeedl1ng/they

Сборка для Minecraft 1.12.2, с упором на реалистичность и выживание. На базе SRP и Cleanroom

cleanroom java21 java25 minecraft minecraft-1-12-2 minecraft-modpack srp

Last synced: 13 Jan 2026

https://github.com/ggruzdov/fleet-monitoring

Demo project of sensors telemetry collecting and viewing aggregated data. Java 21, Docker, MQTT, EMQX, HAProxy, TimescaleDB.

docker docker-compose emqx haproxy java21 mqtt spring-boot timescaledb

Last synced: 12 Apr 2026

https://github.com/carloshenriquefs/bookstore-ai

✅🌐🤖 - Spring AI: Inteligencia Artificial no ecossistema Spring

java21 maven openai spring-ai

Last synced: 10 May 2026

https://github.com/carloshenriquefs/courses

💻🖱️- Programming Courses

api crud hibernate-jpa java21 mapper

Last synced: 14 May 2026

https://github.com/carloshenriquefs/eventos-tec

📆⚙️ - Backend for eventos tec - em finalizacao

aws flyway java21 maven postgres s3-bucket spring

Last synced: 12 Apr 2026

https://github.com/carloshenriquefs/loans

✅💵 - Challenge Loans

java21 junit loans maven mockito spring

Last synced: 13 Apr 2026

https://github.com/rudradcruze/librarymanagementsystem

This is a simple library management system that I have created using Java and MySQL. The system allows you to add, update, delete, and search for books. It also allows you to issue and return books. The system is designed to be used by librarians and library staff.

entity exception-handling java java21 mapping modelmapper mysql springboot

Last synced: 31 Mar 2025

https://github.com/singhalsonal/todos-java21-k8s

Todos crud api with Java 21, Spring 3.4+, Gradle, Mongodb, Redis, and K8s

java21 k8s k8s-cluster kubernetes mongodb redis spring

Last synced: 13 Apr 2026

https://github.com/nguyenbn7/design-patterns

Head First Design Patterns examples

gradle gradle-multi-project java21 javacore

Last synced: 25 Apr 2026

https://github.com/cnzrly/hospital-app

A Java-based hospital management application built without Spring, utilizing pure Java with PostgreSQL as the data source. This project implements a modular architecture with Controller, Service, Repository, DTO, Mapper, and Entity layers, aiming to manage patient, doctor, and appointment data efficiently.

dao-design-pattern dto hospital-management-system java21 spring spring-boot

Last synced: 17 Jan 2026

https://github.com/devjefster/micro-cache-ttl

Lightweight, high-performance in-memory cache that automatically expires entries and provides callbacks when an item is removed.

cache java java21

Last synced: 01 Mar 2025

https://github.com/malfaa/pmdp

"Plataforma de Mentoria e Desenvolvimento Profissional" foi realizado como projeto de semestre da Universidade (Instituto Infnet), o objetivo era criar a documentação completa. Neste caso, será feito o sistema presente na documentação!

angular-cli java21 jpa spring-boot

Last synced: 29 Apr 2026

https://github.com/carloshenriquefs/e-commerce

- E-commerce

java21

Last synced: 06 Oct 2025

https://github.com/abhinav195/library-management-system

Library Management System in Microservice style with User service(8080), Books Service(8081), Issues Service(8082) and Gateway Service(9000)

actuator caffeine-cache hikaricp java21 jjwt mysql open-feign postman spring-boot spring-data-jpa spring-hibernate spring-security webflux

Last synced: 07 Oct 2025

https://github.com/dilermando-lima/springboot-grafana-prometheus-loki

Monitoring metrics and collecting logs with prometheus, grafana ana loki between rest apis

docker gradle grafana java21 loki prometheus spring spring-boot

Last synced: 14 Apr 2026

https://github.com/rainggor/taskmanagementsystems

Task Management System — это современное приложение для управления задачами, разработанное на Java 21 и Spring Boot 3.3.5. Система включает в себя возможности аутентификации, управления пользователями, создания, отслеживания и обновления задач. Используются PostgreSQL, Docker Compose и OpenAPI/Swagger для удобной работы и масштабируемости.

java java21 postgresql spring spring-boot spring-security sql

Last synced: 14 Apr 2026

https://github.com/viiku/fraud-detection

Case Study:- A real-time fraud detection tool built with Java and Spring Boot, designed for extremely high throughput and scalable microservices environments. This project demonstrates modern fraud detection techniques, including rule-based and anomaly-based detection, leveraging Kafka, Redis, PostgreSQL, and container orchestration.

docker grafana java21 kafka maven prometheus redis

Last synced: 14 Apr 2026

https://github.com/aliabbos-ashurov/e-health

A comprehensive Java-based Hospital Management System for managing patients, appointments, electronic health records, billing, inventory, and staff roles. Built with Java, Spring Boot and a role-based access system.

hibernate java java21 jwt-token mapper orm spring-security

Last synced: 18 Mar 2025

https://github.com/joseharao/app-helpdesk

Sistema Back-End e Front End de Chamado de HelpDesk Java 17 + Angular 18

angular angularjs java java21 mysql spring spring-boot springboot typescript

Last synced: 14 Apr 2026

https://github.com/juanitadevelopment/amber-timerjob

A modern, lightweight scheduler library for Java applications that provides flexible job scheduling with support for interval-based, time-based, date-based, and cron-style scheduling.

cron java java21 library maven scheduler scheduling timerjob

Last synced: 20 Apr 2026

https://github.com/igorgp06/desafio-backend-junior-itau

Neste repositório você vai encontrar a solução do desafio da vaga de programador backend junior do banco itaú

java-21 java21 javascript rest-api restapi spring spring-boot

Last synced: 06 Apr 2026

https://github.com/gabryelboeira/java-kotlin-spring

Aprenda na prática sobre a linguagem de programação Kotlin e Spring Framework, desenvolvendo um projeto real!

flyway jacoco java21 junit5 kotlin mockk mysql padroes-de-projetos spring-boot spring-data spring-security testes-unitarios

Last synced: 24 Oct 2025

https://github.com/delphington/fractal-flame

Генератор фрактального пламя 🔥

fractal-flames java21 junit maven multithreading

Last synced: 10 May 2026

https://github.com/deepcloudlabs/dcl200-2023-nov-13

DCL-200: Java Performance Tuning and Optimization

java17 java21 jcmd jmc jvisualvm

Last synced: 15 May 2026

https://github.com/kzmlabs/flink-statefun

Actively maintained continuation of Apache Flink Stateful Functions — updated for Flink 2.2.0 and Java 21, published to Maven Central as io.github.kzmlabs.flinkstatefun. Stateful serverless stream processing on Kubernetes.

actor-model apache-flink distributed-systems event-driven event-driven-architecture flink flink-kubernetes-operator java java21 kafka kubernetes maven-central rocksdb serverless stateful-functions stateful-stream-processing statefun stream-processing

Last synced: 29 Apr 2026

https://github.com/chrisgleissner/java-kotlin

Maintainable Java Code: Comparison of Java+Lombok with Java+Kotlin

comparison gradle java java21 kotlin lombok

Last synced: 11 May 2026

https://github.com/adarsh0311/shopsphere-backend

🛒 ShopSphere - Full-stack e-commerce platform built with Spring Boot & Angular. Features product catalog, order management, Stripe payments, SQS messaging, AWS deployment. Production-ready with PostgreSQL, comprehensive API endpoints, and cloud infrastructure integration.

aws aws-sns cloud e-commerce java java21 order-management postgresql rest-api spring-boot spring-data-jpa sqs stripe-payments webaplication

Last synced: 15 Apr 2026

https://github.com/knands42/sensor-streaming-app-java

Project that mimic a real-time producer from a sensor hardware and consume it using Java Reactor

gradle java21 reactor-core threading-synchronization

Last synced: 20 May 2026

https://github.com/youhad08/e-bank-backend-springboot

Digital banking system backend developed with Spring Boot. Includes customer and account management, operations, and REST APIs.

api hibernate java java21 lombok maven mysql openapi rest-api restful-api spring-boot spring-data-jpa spring-framework spring-web swagger

Last synced: 15 Apr 2026

https://github.com/inpercima/mittagstisch

The lunch in your area. Based on Leipzig (Plagwitz, Lindenau).

angular angular-cli angular-cli21 angular21 java21 leipzig lunch mittag spring-boot spring-boot3 webapp

Last synced: 06 Mar 2026

https://github.com/carloshenriquefs/secure-password

✅🗝️🔒- Challenge Secure Password

java21 maven regex spring-boot

Last synced: 16 Apr 2026

https://github.com/julianobrl/discordbotcore

Main core with all basic settings for a working bot using DiscordBotFramework.

discord-bot discord-bot-framework docker-container java21 maven plugin-integration

Last synced: 16 Apr 2026

https://github.com/wallanpsantos/spring-studious-lab-aws

Objetivo do Projeto: Criar uma estrutura reutilizável para futuros projetos com serviços AWS. Motivação: Resolver um exercício de construir toda a infraestrutura do zero.

aws clean-architecture docker java21 localstack mongodb s3 sns spring-boot spring-cloud sqs

Last synced: 16 Apr 2026

https://github.com/knands42/dataengineering-1billion-rows-per-hour

A project that simulate how to build a complete workflow to persist 1 billion rows per hour

data-engineering graphana java java21 kafka makefile posgr prometheus python python3 spark sql

Last synced: 12 Mar 2025

https://github.com/BC100Dev/rpi-setup

Design your own Raspberry Pi image – quickly!

automation cpp cpp17 java java21 raspberry-pi raspberrypi setup

Last synced: 28 Oct 2025

https://github.com/carloshenriquefs/bookstore-system

📖 - Bookstore System | Rocketseat

java21 jdk

Last synced: 23 Oct 2025

https://github.com/mdmohsinhaider/portfolio-management-system

A Spring Boot-based Portfolio Management System with RESTful APIs for managing personal and professional details. Includes JPA, MySQL, Lombok, and layered architecture.

api api-rest developer-tools intelij-ide java java21 jpa jpa-hibernate jpa-persistence-applications lombok lombok-maven mysql mysql-database spring-boot spring-security

Last synced: 20 Apr 2026

https://github.com/jeondoh/massive-coupon

멀티모듈 대용량 이벤트 쿠폰 발급 프로젝트

java21 multi-module-project spring-boot webflux

Last synced: 21 Apr 2026

https://github.com/thallyta-castro-cv/spring-webflux-sale-tickets

Saletickets é uma API de gerenciamento de eventos e ingressos e é um microserviço reativo com Webflux que faz parte do projeto Sale Tickets que é um site de eventos onde haverá vendas de ingressos. Esta API é desenvolvida com Spring Boot, permitindo criar, buscar, atualizar e excluir eventos.

deepl java21 saletickets spring spring-webflux

Last synced: 22 Apr 2026

https://github.com/streamlined2/factorialcalculator

Factorial calculator with fork/join framework

factorial-calculation forkjoinpool java21 jmh-benchmark junit5

Last synced: 22 Apr 2026

https://github.com/krkarma777/javelin

A high-performance, lightweight Java Web Application Server powered by Virtual Threads. 🚀

concurrency high-performance http-server java java21 javelin lightweight modern-java virtual-threads was web-server

Last synced: 23 Apr 2026

https://github.com/wiriswernek/library-api

Repositório da API de gerenciamento de livros desenvolvida no curso de Design de API's RestFul com Spring Boot, TDD e o novo JUnit5 da Udemy

bdd java java21 junit5 mockito rest-api spring-boot tdd test

Last synced: 28 Apr 2026

https://github.com/shilohooo/project-templates

[Opinionated] Project templates (starter / scaffold) for better DX 🛠️

backend dx frontend full-stack java java21 maven project-templates scaffold starter templates

Last synced: 28 Apr 2026

https://github.com/mshirazkamran/client-server-chatroom-cn

This is my Computer Networks project that uses classes from java.net and java.io package to implement chatroom the functionality.

ip java java21 java22 java23 javaio port socket-io socket-programming tcp tcp-client tcp-server tcp-socket

Last synced: 02 May 2026

https://github.com/sideral-ti/sis01_gestion_lista_estudiantes

Sistema de Gestion de Lista de Estudiantes, CRUD con Java 21 -> CODE: SIS01MOD01

crud java java21 maven sis01mod01s01 sis01mod01s02 sis01mod01s03

Last synced: 02 May 2026

https://github.com/carloshenriquefs/poi

- Challenge Receptor GPS

java21 jpa

Last synced: 02 May 2026

https://github.com/thallyta-castro-cv/spring-rabbitmq-order-ops

Este repositório contém um mono repo com três microserviços desenvolvidos em Spring Boot que trabalham juntos para processar pedidos de forma assíncrona utilizando RabbitMQ.

java21 rabittmq spring-amqp spring3 springdoc

Last synced: 14 Jun 2025

https://github.com/knands42/events-producer

A high-performance, plug-and-play Kafka event producer template

data-engineering grafana graphana java java21 kafka makefile postgresql prometheus python3 sql

Last synced: 08 May 2026

https://github.com/chomiii19/user-authentication-using-qr-code

📌 This Java system authenticates a user by scanning its QR code. A user is authenticated if it exists in the database. The system can also perform CRUD operations in the Mysql database if the user role is admin. You can create a user(also generates its own qr code), update, and delete.

java java21 qrcode

Last synced: 04 May 2026

https://github.com/extrawest/gemini-function-calling-spring-ai-showcase

Gemini Function Calling in Vertex AI. Designed using Java 21, Spring Boot, and LangChain4J, this cutting-edge service integrates Gemini Call Function with external APIs to deliver seamless search capabilities for flights, hotels, and attractions

ai call-function gemini java21 langchain4j maven spring-boot vertex-ai

Last synced: 05 May 2026

https://github.com/vishnuka084/rabbitmq_emailservice

This project is a simple mail service implemented using Spring Boot and RabbitMQ. It provides a scalable solution for sending emails asynchronously using message queuing.

java21 mysql postman rabbitmq springbppt

Last synced: 05 May 2026

https://github.com/nazzmul-anik/blog-application

✅ "This project is currently under development."

java21 maven mvc-architecture mysql-database spring-boot3 tomcat-server

Last synced: 05 May 2026

https://github.com/neslisezen/crm-system

#kafka #microservices #java21 #docker #spring-boot

java21 kafka microservices spring-boot

Last synced: 05 May 2026

https://github.com/rudradcruze/coursemanagementsystem

This is a simple college management system created using Java and Spring Boot. The system allows you to manage students, professors, subjects, and admissions. The system is designed to be used by college administration staff.

entity java java21 modelmapper mysql rest-api springboot

Last synced: 06 May 2026

https://github.com/debarjita/organisational-hierarchy

This is a Spring Boot project that builds an Organization Hierarchy Management System — managing Departments, Sub-Departments, Teams, Positions, and Employees.

h2-database java21 lombok maven spring-boot spring-security springdata-jpa

Last synced: 07 May 2026

https://github.com/vishnuka084/email-service-spring-boot-

This Spring Boot application demonstrates how to send emails with attachments using Spring Boot's email functionality. It provides a REST API endpoint to send emails with attachments programmatically.

email java21 rabbitmq service spring-boot

Last synced: 19 May 2026

https://github.com/karatuss/bstack

Backend-specialized Claude Code harness for Java 21 / Spring Boot 3.x — 17 domain skills: architecture, JPA, security, testing, and more. | Java 백엔드 특화 Claude Code 하네스

ai-coding anthropic archunit backend claude claude-code developer-tools harness java java21 jpa llm-tools spring-boot spring-security testcontainers

Last synced: 12 May 2026

https://github.com/SoneyBun/SunCalcHealth

This project is a simple Java application that calculates your Body Mass Index (BMI) and determines your weight class based on your height and weight.

bmi-calculator indie indiedev intellij intellij-idea java java-21 java21 weight

Last synced: 01 Oct 2025

https://github.com/ddouglss/springboot-microservicos-processamento

O Processamento Service é responsável por consumir mensagens de pedidos e realizar o processamento.

cloudamqp java21 postgresql rabittmq spring-amqp spring-boot springdata-jpa

Last synced: 08 Apr 2026

https://github.com/gabrielspassos/java-sandbox

:coffee: :notebook: Repo with java pocs

java java11 java17 java21 java8

Last synced: 01 Nov 2025

https://github.com/athrocks/social-media-api

A comprehensive Social Media API built with Spring Boot. This project includes core functionalities like following system, post creation, likes, comments, and city-based categorization. The API is designed to support scalability, efficiency, and ease of integration with front-end applications.

api java21 maven mysql mysql-database rest-api restful-api spring spring-boot spring-security swagger

Last synced: 11 Apr 2026

https://github.com/thecoachingonline/learning-java

Here are my study notes for learning Java

java java11 java17 java21 java8

Last synced: 02 Jan 2026

https://github.com/ddouglss/springboot-microservicos-pedido

microsserviços composta por dois serviços independentes pedido e processo que se comunicam via RabbitMQ, utilizando PostgreSQL como banco de dados.

cloudamqp java21 maven postrgresql rabbitmq spring-amqp spring-boot spring-data-jpa

Last synced: 08 Apr 2026

https://github.com/carloshenriquefs/app-quarkus

:atom::electron: - App Quarkus

hibernate jackson java21 mysql quarkus rest-api

Last synced: 03 Feb 2026

https://github.com/ayush272002/todo-list

A full-stack to-do list application built with Spring Boot for the backend and Next.js for the frontend.

docker hibernate java21 nextjs postgresql spring-boot

Last synced: 08 Apr 2026

https://github.com/mickablondo/quarkus-reactive-test

A reactive Quarkus demo app using Hibernate Reactive to manage users and sports via non-blocking REST APIs.

gradle hibernate-reactive jakarta java21 mutiny panache quarkus reactive-programming rest-api testcontainers-postgres

Last synced: 08 May 2026

https://github.com/rcsoyer/console-game

rock-paper-scissors console game

cli console-application console-game gradle java21

Last synced: 19 May 2026

https://github.com/lianglliu/super-maria

Classic Super Mario Bros. game implemented with Java

gradle java21 supermaria

Last synced: 05 Apr 2025

https://github.com/carloshenriquefs/spring-app

- Spring App Teste

java21 maven spring

Last synced: 18 Feb 2026