Java courses can help you learn object-oriented programming, data structures, exception handling, and multithreading concepts. You can build skills in writing efficient algorithms, debugging code, and developing user interfaces. Many courses introduce tools like Eclipse and IntelliJ IDEA, which are commonly used for coding and testing Java applications, along with frameworks such as Spring and Hibernate that facilitate web development and database management.

Skills you'll gain: React.js, Code Reusability, Javascript, Front-End Web Development, Web Development
Intermediate · Guided Project · Less Than 2 Hours

Johns Hopkins University
Skills you'll gain: Apache Hadoop, File Systems, Big Data, File I/O, Data Infrastructure, Java, Data Storage Technologies, Java Programming, Data Persistence, Infrastructure Architecture, File Management, Data Processing, Distributed Computing, Data Storage, Development Environment, Scalability
Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: React Native, Mobile Development, Responsive Web Design, Cross Platform Development, Mobile Development Tools, UI Components, Application Development, Ajax, User Interface (UI), React.js, JavaScript Frameworks, Data Persistence, Data Store, Data Storage Technologies, Context Management, Development Environment, Javascript, Data Management
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Extensible Markup Language (XML), Extensible Languages and XML, Web Services, Java, Cascading Style Sheets (CSS), Data Mapping, Verification And Validation, Data Validation, Memory Management
★ 4.4 (12) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: JavaScript Frameworks, Node.JS, Web Frameworks, Restful API, Web Development, Web Applications, Application Programming Interface (API), Server Side, File Systems, Javascript, File I/O, Web Servers, Databases, Authentications, Middleware, Cryptography
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Cloud-Native Computing, Cloud Applications, Cloud Development, Google App Engine, Google Cloud Platform, Serverless Computing, Application Deployment, Cloud Deployment, Application Performance Management, Application Design, Infrastructure as Code (IaC), Cloud API, Data Store, Application Development, API Gateway, Microservices, Authentications, Cloud Storage, Cloud Computing, Debugging
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Back-End Web Development, Full-Stack Web Development, Server Side, Restful API, JavaScript Frameworks, Web Development, Web Frameworks, Frontend Integration, Web Applications, Web Servers, Javascript, Servers
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Webpack, Object Oriented Programming (OOP), Object Oriented Design, Full-Stack Web Development, JSON, Web Development Tools, Javascript, Event-Driven Programming, HTML and CSS, Application Programming Interface (API), Application Deployment, Web Applications, Web Development, Kanban Principles, Code Reusability, Cascading Style Sheets (CSS), Hypertext Markup Language (HTML), Browser Compatibility, Programming Principles, Data Persistence
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Apache Kafka, Spring Framework, JUnit, Spring Boot, Unit Testing, Integration Testing, Data Pipelines, Event-Driven Programming, Public Key Infrastructure, Encryption, Distributed Computing
Intermediate · Course · 3 - 6 Months

LearnKartS
Skills you'll gain: Agentic Workflows, Tool Calling, Agentic systems, AI Workflows, Google Gemini, AI Orchestration, Server Side, Gemini, Generative AI Agents, AI Integrations, Back-End Web Development, LLM Application, OpenAI API, Node.JS, Large Language Modeling, Web Development, PostgreSQL, Data Processing, Data Modeling, Javascript
Intermediate · Course · 1 - 3 Months

Scrimba
Skills you'll gain: JSON, UI Components, Application Deployment, Data Import/Export, Code Reusability, Web Frameworks, Web Design and Development, Front-End Web Development, Web Development Tools, Full-Stack Web Development, Web Development, HTML and CSS, Frontend Performance, Content Management, Cascading Style Sheets (CSS), Javascript
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Selenium (Software), Test Automation, Test Tools, Test Data, Test Case, Test Script Development, Software Testing, Test Execution Engine, Java, Automation, Code Reusability
Intermediate · Course · 3 - 6 Months