Core Java courses can help you learn object-oriented programming, exception handling, multithreading, and Java Collections. 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.

Oracle
Skills you'll gain: Java, Java Programming, Object Oriented Programming (OOP), Object Oriented Design, Oracle Cloud, Computer Programming, Cloud Development, Integrated Development Environments, Programming Principles, Development Environment, Code Reusability
Beginner · Course · 1 - 4 Weeks

EDUCBA
Skills you'll gain: File I/O, Object Oriented Programming (OOP), Java Programming, Data Structures, Java, Data Persistence, Programming Principles, Data Store
Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Data Structures, Spring Boot, Restful API, Model View Controller, Spring Framework, Web Services, Java Programming, Java, Back-End Web Development, Authentications, Authorization (Computing), Algorithms, Application Security
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: GitHub Copilot
Intermediate · Course · 3 - 6 Months

EDUCBA
Skills you'll gain: Spring Framework, Spring Boot, Application Development, Redis, Java, Java Programming, Application Frameworks, Frontend Integration, Object-Relational Mapping, Web Development, Secure Coding, Web Development Tools, Database Development, Integrated Development Environments, Authentications, Application Security, Performance Tuning, Unit Testing, Command-Line Interface, Event Monitoring
Mixed · Course · 1 - 3 Months

Skills you'll gain: C# (Programming Language), Software Architecture, .NET Framework, Object Oriented Design, Distributed Computing, Scalability, Object Oriented Programming (OOP), Software Design, Object-Relational Mapping, Microservices, MongoDB, Data Access, Model View Controller, Performance Tuning, Computer Programming, Maintainability, NoSQL, Event-Driven Programming
Intermediate · Course · 1 - 4 Weeks

Edureka
Skills you'll gain: JUnit, Apache Maven, Java Programming, Java, Unit Testing, Software Design Patterns, Test Automation, Build Tools, Software Design, Data Access, Maintainability, Software Testing, IntelliJ IDEA, SQL, Computer Programming, Programming Principles, Object Oriented Programming (OOP), Software Engineering, Software Development, Design Strategies
Intermediate · Course · 1 - 4 Weeks

Edureka
Skills you'll gain: Java, Java Programming, Object Oriented Programming (OOP), Computer Programming, Object Oriented Design, Memory Management, Programming Principles, Software Engineering, Debugging, Program Development, Data Structures, IntelliJ IDEA, Application Development, Software Development, Virtual Machines
Beginner · Course · 1 - 4 Weeks

Birla Institute of Technology & Science, Pilani
Skills you'll gain: Java Programming, Java, Object Oriented Programming (OOP), Object Oriented Design, File I/O, Programming Principles, Computer Programming, Code Reusability, Data Structures, Software Engineering, Program Development, Data Access, Data Persistence, Unit Testing, Debugging, OS Process Management, Performance Tuning
Build toward a degree
Intermediate · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Restful API, Spring Framework, API Design, Application Programming Interface (API), Data Validation, Model View Controller, Back-End Web Development, Spring Boot, Server Side, Java Programming, Verification And Validation, Maintainability, Enterprise Application Management, Configuration Management, Extensible Markup Language (XML)
Intermediate · Course · 1 - 4 Weeks

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, Debugging
Build toward a degree
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Java Programming, Java, Performance Tuning, Spring Framework, System Programming, Application Performance Management, Algorithms, JUnit, OS Process Management, Application Frameworks, Programming Principles, Spring Boot, Scalability
Beginner · Course · 1 - 3 Months