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.

Pearson
Skills you'll gain: Java, Transaction Processing, Java Programming, Data Access, Object Oriented Design, Dataflow, Database Management, Stored Procedure, SQL, Integration Testing, Application Development, Information Management, Object-Relational Mapping, Command-Line Interface, Application Deployment, Data Integrity, OS Process Management, Functional Design, Application Programming Interface (API), Mitigation
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Object Oriented Design, Computer Programming
Intermediate · 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, Application Security, Java, Containerization, SQL, Databases, Application Frameworks, NoSQL, Docker (Software), Kubernetes, Test Driven Development (TDD), Object Oriented Design
Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Spring Framework, Java, Object Oriented Design, Object Oriented Programming (OOP), Software Design Patterns, Model View Controller, Middleware, Extensible Markup Language (XML), Integration Testing, Dependency Analysis
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: JUnit, Apache Maven, Spring Framework, Spring Boot, Model View Controller, Unit Testing, Microservices, Application Development, Redis, Restful API, YAML, Java, Java Programming, MongoDB, Application Deployment, Application Design, NoSQL, Ajax, Hibernate (Java), Software Testing
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Maintainability
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Data Structures, Debugging, Functional Design
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Load Balancing, ASP.NET, Test Driven Development (TDD), Debugging, C# (Programming Language), Software Testing, Scalability, Performance Testing, Restful API, Unit Testing, Microservices, .NET Framework, Object-Relational Mapping, Software Architecture, Web Applications, User Accounts, Single Sign-On (SSO), Object Oriented Design, Distributed Computing, Redis
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: JUnit, Spring Framework, Spring Boot, Java, Apache Maven, Hibernate (Java), Unit Testing, Gradle, Microservices, Object-Relational Mapping, Software Testing, Testability
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Simple Object Access Protocol (SOAP), Development Environment, Hibernate (Java), Systems Architecture, Back-End Web Development, Service Oriented Architecture, Eclipse (Software), Authentications
Beginner · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: JUnit, Unit Testing, Debugging, Java, Maintainability, Software Development, Secure Coding, Software Testing, Test Case, Authentications, Application Security, Cryptography, Object Oriented Programming (OOP), Eclipse (Software), Integrated Development Environments, Encryption, Data Structures, File Management
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: CI/CD, Integration Testing, Continuous Integration, Docker (Software), Java, Containerization, Software Design Patterns, Development Testing, Microservices, Object Oriented Design
Intermediate · Course · 1 - 4 Weeks