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.

LearnKartS
Skills you'll gain: JUnit, File I/O, Java Programming, Object Oriented Programming (OOP), Java, Unit Testing, Code Reusability, Maintainability, Software Development, Secure Coding, Software Testing, Computer Programming, Application Development, Authentications, Application Security, Android Development, Debugging, Solution Design, Design Strategies, Design Elements And Principles
★ 4.6 (85) · Beginner · Specialization · 1 - 3 Months

University of Pennsylvania
Skills you'll gain: File I/O, Matplotlib, Object Oriented Design, Java, Object Oriented Programming (OOP), Data Analysis, Unit Testing, Pandas (Python Package), Java Programming, Eclipse (Software), Application Development, Data Visualization, Data Structures, Data Science, Data Cleansing, Debugging, Programming Principles, Computer Programming Tools, Python Programming, Computer Programming
★ 4.5 (1.9K) · Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Apache Maven, File I/O, Build Tools, Data Import/Export, Object Oriented Programming (OOP), JSON, Java Programming, Debugging, JUnit, Code Reusability, Software Documentation, Programming Principles, Data Structures, File Systems, Computer Programming, Java, Data Validation, Network Protocols, Unit Testing, Computer Science
★ 4.5 (200) · Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Java Programming, Java, Object Oriented Programming (OOP), Computer Programming, Virtual Machines, Memory Management
★ 4.7 (538) · Beginner · Course · 1 - 4 Weeks

SkillsBooster Academy
Skills you'll gain: Object Oriented Design, Object Oriented Programming (OOP), Java Programming, Java, GitHub Copilot, Vibe coding, Computer Programming, IntelliJ IDEA, Code Reusability, Data Structures, Programming Principles, Program Development, Development Environment, Integrated Development Environments, Spring Boot, Computer Programming Tools, Code Review, Software Installation, Application Deployment, Back-End Web Development
Beginner · Course · 1 - 3 Months

EDUCBA
Skills you'll gain: JUnit, Test Automation, Unit Testing, Java Programming, Java, Object Oriented Design, File I/O, Verification And Validation, Software Testing, Development Testing, Quality Assurance, Software Quality Assurance, System Testing, Computer Programming, Application Development, Software Development, Test Case, Data Validation, Application Design, System Design and Implementation
★ 4.9 (21) · Beginner · Specialization · 1 - 3 Months

University of California San Diego
Skills you'll gain: Event-Driven Programming, Interactive Data Visualization, Java, Java Programming, Object Oriented Programming (OOP), User Interface (UI), Object Oriented Design, Computer Programming, UI Components, User Interface (UI) Design, Algorithms, Software Engineering, Geospatial Mapping, Software Documentation
★ 4.7 (5.8K) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: API Testing, Restful API, Open Web Application Security Project (OWASP), Java Programming, API Design, API Gateway, Postman API Platform, Software Documentation, Software Testing, Application Programming Interface (API), Java, Performance Testing, Performance Tuning, Web Frameworks, Application Deployment, Application Security, Web Services, Software Versioning, Spring Boot, Computer Programming
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Hibernate (Java), Object-Relational Mapping, CI/CD, Spring Boot, Restful API, Java Programming, Integration Testing, Continuous Integration, Database Development, Cloud Deployment, Application Security, Java, Containerization, SQL, Databases, NoSQL, Docker (Software), Kubernetes, Test Driven Development (TDD), Object Oriented Design
★ 4.5 (52) · Beginner · Specialization · 1 - 3 Months

EDUCBA
Skills you'll gain: Spring Boot, Application Development, Redis, Java, Application Design, Web Development, Web Applications, Development Testing, Databases, Data Integration, Database Application, Application Security, Unit Testing, Relational Databases, Data Access, Integration Testing, Hypertext Markup Language (HTML)
★ 4.4 (49) · Intermediate · Course · 1 - 3 Months

Heriot-Watt University
Skills you'll gain: Object Oriented Programming (OOP), Java, Java Programming, Computer Programming, Application Development, Program Development, Programming Principles, Computational Logic, Software Development, Software Development Life Cycle
★ 4.9 (8) · Beginner · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Responsible AI, MLOps (Machine Learning Operations), Data Preprocessing, Model Deployment, Jenkins, Apache Mahout, AI Security, Applied Machine Learning, Classification Algorithms, Java, Java Programming, Federated Learning, Apache Spark, Machine Learning Software, Application Deployment, Deep Learning, Machine Learning, Spring Boot, Natural Language Processing, Reinforcement Learning
Intermediate · Specialization · 1 - 3 Months