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.

LearnKartS
Skills you'll gain: Java Programming, Java, Object Oriented Programming (OOP), Performance Tuning, OS Process Management
★ 4.7 (14) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Apache Spark, Apache Hadoop, Distributed Computing, Big Data, Cloud Computing Architecture, Scalability, Java, Cloud Applications, Data Pipelines, Cloud Development, Dataflow, Data Processing, Software Architecture, Cloud-Native Computing, Java Programming, Solution Architecture, Cloud Computing, Performance Tuning, Microservices, Serverless Computing
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Object Oriented Programming (OOP), Java, Object Oriented Design, Java Programming, Maintainability, Software Design, Data Structures, Software Architecture, Memory Management, Programming Principles, Code Reusability, Data Management, Performance Tuning
Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Eclipse (Software), Java Programming, Object Oriented Programming (OOP), Software Development Tools, Java, Computer Programming Tools, Object Oriented Design, Integrated Development Environments, Development Environment, Computer Programming, Programming Principles, Virtual Machines, Computing Platforms, Algorithms
★ 4.4 (640) · Beginner · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Apache Maven, Spring Framework, Microservices, Java Platform Enterprise Edition (J2EE), Spring Boot, Java, Java Programming, Build Tools, Back-End Web Development, Software Architecture, Server Side, Load Balancing, Cloud Development, Web Services, Restful API, Systems Architecture, Web Applications
★ 4.5 (52) · Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Java Programming, Object Oriented Design, Programming Principles, File I/O, Data Import/Export, Debugging, File Management, Memory Management
Beginner · Course · 3 - 6 Months

Skills you'll gain: GitHub Copilot, Software Development, Code Reusability
Intermediate · Course · 3 - 6 Months

EDUCBA
Skills you'll gain: Java Programming, Java, Object Oriented Design, File I/O, Application Development, Computer Programming, Database Management, Databases, Relational Databases, Software Development, Interactive Design, File Systems, Game Design, Computer Science, Simulation and Simulation Software, Design
★ 4.9 (20) · Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Spring Framework, Java Programming, Java, File I/O, Java Platform Enterprise Edition (J2EE), Object Oriented Programming (OOP), Application Frameworks, Code Reusability, Data Structures, File Management
★ 4.7 (224) · Intermediate · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Java Programming, Java, Object Oriented Programming (OOP), Object Oriented Design, Software Design, Programming Principles
★ 4.7 (213) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Restful API, Application Security, Java, Java Programming, Application Frameworks, Model View Controller, Security Controls, Development Environment, Web Applications, Application Programming Interface (API), Apache Maven, Authorization (Computing), Authentications, Configuration Management
★ 4.4 (38) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Restful API, Application Deployment, Microservices, Docker (Software), Spring Boot, Spring Framework, Containerization, CI/CD, API Design, Application Programming Interface (API), Java Programming, Hibernate (Java), Back-End Web Development, Systems Architecture, Java, Software Architecture, Software Design, Authentications, Software Development, IntelliJ IDEA
★ 4.1 (19) · Intermediate · Course · 1 - 4 Weeks