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.

Board Infinity
Beginner · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Stored Procedure, PL/SQL, Relational Databases, Object-Relational Mapping, SQL, Data Access, Java Platform Enterprise Edition (J2EE), Databases, Database Design, Data Persistence, Object Oriented Design, Java, Data Manipulation, Data Mapping, Java Programming, Database Development, JUnit, Object Oriented Programming (OOP), Database Software, Query Languages
Beginner · Specialization · 1 - 3 Months

Universidad de Palermo
Skills you'll gain: Eclipse (Software), Java, Java Programming, Object Oriented Programming (OOP), Integrated Development Environments, Data Structures, File I/O, Programming Principles, Algorithms, Computer Programming, Software Development Tools, Computational Thinking, Software Development
Beginner · Course · 1 - 4 Weeks

EDUCBA
Skills you'll gain: Model View Controller, Java Platform Enterprise Edition (J2EE), Back-End Web Development, Server Side, Data Access, Apache Tomcat, Application Servers, Java Programming, Relational Databases, Databases, Java, Web Servers, SQL, Authentications, Web Applications, Secure Coding, Software Design Patterns, Data Persistence
Intermediate · Course · 1 - 3 Months

Universidad de Palermo
Skills you'll gain: Eclipse (Software), Object Oriented Programming (OOP), Java, Integrated Development Environments, Data Structures, Java Programming, File I/O, Computer Programming, Algorithms, Programming Principles, Development Environment, Debugging
Beginner · Course · 1 - 4 Weeks

Edureka
Skills you'll gain: ASP.NET, Full-Stack Web Development, Maintainability, PostgreSQL, .NET Framework, Database Design, Object-Relational Mapping, Back-End Web Development, Web Development, Database Management, Databases, C# (Programming Language), Authentications, Middleware, Application Programming Interface (API), Web Design and Development, Authorization (Computing), API Design, Web Development Tools, User Interface (UI)
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Open Web Application Security Project (OWASP), ASP.NET, Authorization (Computing), Secure Coding, DevSecOps, AI Security, Authentications, Application Security, Responsible AI, Hardening, Data Security, AI Integrations, Software Development Life Cycle, .NET Framework, Security Controls, Security Engineering, Multi-Factor Authentication, Encryption, Software Engineering, Building Codes
Intermediate · Course · 1 - 3 Months

LearnKartS
Skills you'll gain: Amazon Web Services, Cloud Infrastructure, Cloud Storage, Cloud Services, Amazon S3, Amazon Elastic Compute Cloud, Amazon Redshift, Data Infrastructure, Infrastructure As A Service (IaaS), Cloud Engineering, Amazon DynamoDB, Data Storage, Cloud Computing Architecture, Data Storage Technologies, Virtual Networking, Network Architecture, NoSQL, Relational Databases, Database Architecture and Administration, Network Planning And Design
Beginner · Course · 1 - 3 Months

JetBrains
Skills you'll gain: Kotlin, Java Programming, Java, IntelliJ IDEA, Android Development, Mobile Development, Object Oriented Programming (OOP), Integrated Development Environments, Functional Design, Interoperability, Computer Programming, Programming Principles, Scripting, Unit Testing, Software Development, Development Environment, Code Review
Intermediate · Course · 1 - 3 Months

Rice University
Skills you'll gain: Java Programming, Dataflow, Java, Distributed Computing, Programming Principles, Application Frameworks, Algorithms, Performance Tuning, Functional Design, Scalability
Intermediate · Course · 1 - 3 Months

Edureka
Skills you'll gain: Identity and Access Management, Cloud Engineering, Cloud Services, Cloud Deployment, Cloud Solutions, Cloud Management, Authentications, Virtual Networking
Intermediate · Course · 1 - 3 Months

Rice University
Skills you'll gain: Java Programming, Java, Data Structures, System Programming, Programming Principles, Computer Programming, Algorithms, Computer Science, Data Sharing
Intermediate · Course · 1 - 3 Months