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: Docker (Software), Containerization, Web Design and Development, Restful API, User Interface (UI) Design, Node.JS, Application Deployment, MongoDB, Database Management, Databases, JavaScript Frameworks, Web Applications, Web Development, Web Development Tools, Database Application, Server Side, Back-End Web Development, Full-Stack Web Development, Javascript
★ 4.2 (33) · Intermediate · Guided Project · Less Than 2 Hours

University of Colorado Boulder
Skills you'll gain: Field-Programmable Gate Array (FPGA), Hardware Design, Laboratory Experience, Laboratory Reports, Embedded Software, Electronic Hardware, Electrical and Computer Engineering, Electronics Engineering, Laboratory Testing, Engineering Documentation, Electronic Systems, Debugging, System Design and Implementation, Program Development, Software Design, Software Development, Functional Design, Simulation and Simulation Software, Development Environment, Eclipse (Software)
★ 4.3 (27) · Intermediate · Course · 1 - 4 Weeks

Infosec
Skills you'll gain: Authentications, Secure Coding, Cryptography, Application Security, Web Applications, Javascript, Identity and Access Management, Node.JS, Security Awareness
★ 4.5 (70) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: C and C++, C++ (Programming Language), Data Structures, Application Development, Program Development, Data Storage, Programming Principles, Computer Programming, Java Programming, Software Development, Computer Science
★ 4.5 (48) · Beginner · Guided Project · Less Than 2 Hours

SkillsBooster Academy
Skills you'll gain: GitHub Copilot, Vibe coding, Claude Code, Software Development Tools, AI Workflows, Prompt Engineering, Code Review, Software Development, Generative AI Agents, Web Development Tools, Software Engineering, Web Development, Design Software, Generative AI, Front-End Web Development, Artificial Intelligence, Javascript, AI Personalization, React.js, Application Deployment
★ 4.4 (66) · Beginner · Specialization · 3 - 6 Months

LearnQuest
Skills you'll gain: JUnit, Unit Testing, Software Testing, Test Case, Eclipse (Software), Test Tools, Test Data, Test Automation, Test Execution Engine, Integrated Development Environments, Java
★ 3.9 (54) · Intermediate · Course · 1 - 4 Weeks

John Wiley & Sons
Skills you'll gain: Object Oriented Design, Java, Java Programming, Object Oriented Programming (OOP), Software Design Patterns, Maintainability, Software Design, Code Reusability, Functional Design, Data Management, Data Modeling
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Cloud Deployment, CI/CD, Full-Stack Web Development, MongoDB, Application Design, Continuous Integration, Application Deployment, Cloud Applications, React.js, DevOps, NoSQL, Databases, Database Management, Kubernetes, JavaScript Frameworks, Front-End Web Development, Software Architecture, Application Development, Authorization (Computing), Javascript
★ 4.7 (44) · Advanced · Course · 1 - 3 Months

Skills you'll gain: Data Structures, Graph Theory, Algorithms, Game Theory, Java, Java Programming, Programming Principles, Performance Tuning, Computational Thinking, Theoretical Computer Science, Computer Programming, Software Design Patterns, Problem Solving, Solution Design, Applied Mathematics, Geometry
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Other Programming Languages, Program Development, C and C++, C++ (Programming Language), Application Development, Computer Programming, Development Environment, Programming Principles, Software Development, Computer Science
★ 4.4 (61) · Beginner · Guided Project · Less Than 2 Hours
Skills you'll gain: Angular, Test Driven Development (TDD), Web Components, Unit Testing, Development Testing, Web Design and Development, HTML and CSS, Web Development, Test Script Development, Software Testing, Cascading Style Sheets (CSS), Web Applications, Front-End Web Development, JavaScript Frameworks, Hypertext Markup Language (HTML), Development Environment, UI Components, Application Frameworks, Javascript, Data Persistence
★ 4.3 (41) · Intermediate · Course · 1 - 4 Weeks
Skills you'll gain: Vue.JS, HTML and CSS, Hypertext Markup Language (HTML), Web Applications, JavaScript Frameworks, Front-End Web Development, Web Design and Development, Cascading Style Sheets (CSS), Web Components, Web Development, Javascript, Data Persistence
★ 4.2 (45) · Beginner · Course · 1 - 4 Weeks