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.

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
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Prompt Engineering, Prompt Patterns, ChatGPT, Generative AI, Large Language Modeling, Responsible AI, Model Deployment, Restful API, Software Documentation, Application Deployment, Code Review, Software Development, CI/CD, Natural Language Processing, AI Workflows, DevOps, Artificial Intelligence, Artificial Intelligence and Machine Learning (AI/ML), Java Programming, Deep Learning
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Apache Maven, Java, Java Platform Enterprise Edition (J2EE), Object Oriented Design, Hibernate (Java), Unit Testing, File I/O, Docker (Software), Software Design Patterns, Integrated Development Environments, Object-Relational Mapping, Functional Design, Maintainability, System Configuration
Beginner · Specialization · 3 - 6 Months

Princeton University
Skills you'll gain: Data Structures, Algorithms, Java, Performance Testing, Computer Programming, Java Programming, Theoretical Computer Science, Object Oriented Programming (OOP)
Intermediate · Course · 3 - 6 Months

LearnQuest
Skills you'll gain: Java Programming, Java, Object Oriented Programming (OOP), Computer Programming, Object Oriented Design, Development Environment, Data Structures
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Java Programming, Object Oriented Design, Linux Commands
Intermediate · Specialization · 1 - 3 Months

EDUCBA
Skills you'll gain: Spring Boot, Application Development, Redis, Java, Hibernate (Java), Web Development, Database Development, Authentications, Application Security, Performance Tuning, Unit Testing, Command-Line Interface, Event Monitoring, Software Configuration Management
Mixed · Course · 1 - 3 Months

Skills you'll gain: Apache Maven, File I/O, Data Import/Export, Object Oriented Programming (OOP), JSON, Java Programming, Debugging, Object Oriented Design, JUnit, Software Documentation, Data Structures, Computer Programming, Restful API, Integrated Development Environments, Java, Programming Principles, Data Validation, Network Protocols, Unit Testing, Computer Science
Beginner · Specialization · 3 - 6 Months

Board Infinity
Skills you'll gain: Data Structures, Spring Boot, Restful API, Model View Controller, Spring Framework, Java Programming, Java, Authentications, Authorization (Computing), Microservices, Algorithms, Object Oriented Programming (OOP), Dependency Analysis
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Java Programming, Java, Integrated Development Environments, Mobile Development, Computer Programming, Programming Principles, Object Oriented Programming (OOP), Debugging, Data Structures
Beginner · Guided Project · Less Than 2 Hours

LearnQuest
Skills you'll gain: Java Platform Enterprise Edition (J2EE), Application Deployment, Web Applications, Application Servers, Java, Web Servers, Java Programming, Object-Relational Mapping, Web Development, Context Management, Application Frameworks, Scripting, Middleware, Server Side, Data Storage, Session Initiation Protocols, Data Sharing, Data Persistence, Event-Driven Programming, Hypertext Markup Language (HTML)
Intermediate · Specialization · 1 - 3 Months
Skills you'll gain: Build Tools, CI/CD, Software Development Tools, Java, Gradle, Apache Maven, MLOps (Machine Learning Operations), Package and Software Management, Dependency Analysis
Advanced · Course · 1 - 4 Weeks