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: Data Structures, Object Oriented Programming (OOP), Java Programming, Object Oriented Design, Computational Thinking, Algorithms, Debugging, Java, Applied Mathematics, Programming Principles, Computer Programming, Theoretical Computer Science, Numerical Analysis, Computer Programming Tools, Mathematical Theory & Analysis, Pseudocode, Software Installation, Software Architecture, Performance Tuning, Other Programming Languages
Intermediate · 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

Amazon
Skills you'll gain: Git (Version Control System), Software Development Methodologies, Requirements Analysis, Version Control, Systems Development Life Cycle, Application Development, Software Development Life Cycle, Software Development, Agile Software Development, Unified Modeling Language, Software Testing, JUnit, Agile Methodology, Programming Principles, Java Programming, Spring Framework, Maintainability, Debugging, Java, Software Design Patterns
★ 4.8 (46) · Beginner · Course · 1 - 3 Months

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

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: 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 (47) · Beginner · 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)
★ 4.2 (26) · Intermediate · Course · 1 - 4 Weeks

Birla Institute of Technology & Science, Pilani
Skills you'll gain: Database Theory, Database Development, Query Languages, Development Testing, Hibernate (Java), Performance Tuning, Software Testing, Object-Relational Mapping, Frontend Integration
Intermediate · Course · 1 - 3 Months

Vanderbilt University
Skills you'll gain: Spring Boot, API Testing, Spring Framework, Restful API, Application Programming Interface (API), API Design, Data Persistence, Web Applications, Application Frameworks, Development Testing, Software Testing, Web Services, Object-Relational Mapping, Application Security, Authentications, Authorization (Computing), Network Protocols
★ 4.2 (29) · Beginner · Course · 1 - 4 Weeks

Pearson
Skills you'll gain: Java Programming, Java, Program Development, Application Frameworks, Performance Tuning
Intermediate · Course · 1 - 4 Weeks

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 (65) · Beginner · Specialization · 3 - 6 Months

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