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.

Skills you'll gain: Object-Relational Mapping, Spring Framework, Hibernate (Java), Apache Maven, Model View Controller, Relational Databases, Database Design, MySQL, Java Programming, Databases, Java, Full-Stack Web Development, Database Application, Authentications, Application Frameworks, Web Applications, Back-End Web Development, Application Design, Object Oriented Design, Object Oriented Programming (OOP)
★ 4.7 (13) · Beginner · Specialization · 1 - 3 Months

LearnKartS
Skills you'll gain: Spring Framework, Java, Spring Boot, Java Programming, Hibernate (Java), Web Development, Web Servers, Web Components, Servers, Application Deployment, Databases
★ 3.8 (14) · Intermediate · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Object Oriented Programming (OOP), Object Oriented Design, Java Programming, Spring Framework, Java, Spring Boot, Computer Programming, Code Reusability, Programming Principles, Application Frameworks, Data Structures, Development Environment
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: CI/CD, Integration Testing, Continuous Integration, Docker (Software), Java, Cloud Deployment, Containerization, Software Design Patterns, Microservices, Build Tools, Cloud-Native Computing, Object Oriented Design, Software Design, Functional Design
★ 4.8 (13) · Intermediate · Course · 1 - 4 Weeks

Amazon
Skills you'll gain: File I/O, Object Oriented Programming (OOP), Object Oriented Design, Code Reusability, Java Programming, Java, Software Design, File Management, Data Persistence
★ 4.3 (93) · Beginner · Course · 1 - 4 Weeks

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, Spring Framework, SQL, NoSQL, Docker (Software), Kubernetes, Test Driven Development (TDD), Object Oriented Design
★ 4.5 (52) · Beginner · Specialization · 1 - 3 Months

John Wiley & Sons
Skills you'll gain: Java Programming, Java, Memory Management, Object Oriented Design, Programming Principles, Object Oriented Programming (OOP), Computer Programming, Computational Logic, API Design, Data Structures
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Object Oriented Programming (OOP), Java Programming, File I/O, Object Oriented Design, Java, Development Environment, Computer Programming, Programming Principles, Data Persistence, Integrated Development Environments, Memory Management, Debugging, File Management, Application Development, Data Structures
Beginner · Course · 1 - 3 Months

EDUCBA
Skills you'll gain: Object Oriented Design, File Management, Software Design, Software Development, Data Management, System Design and Implementation, Persistence, Technical Design, Operations, Design
★ 5 (13) · Intermediate · Course · 1 - 4 Weeks

John Wiley & Sons
Skills you'll gain: Java Programming, Java, Data Persistence, Object Oriented Programming (OOP), File Systems, Software Design, File Management, Data Management
Advanced · Course · 1 - 3 Months

Skills you'll gain: Object Oriented Design, Memory Management, Software Design Patterns, Functional Design, Maintainability
Intermediate · Course · 3 - 6 Months

Board Infinity
Skills you'll gain: Java Programming, Java, OS Process Management, Memory Management, Data Sharing
Intermediate · Course · 1 - 4 Weeks