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.

LearnQuest
Skills you'll gain: JUnit, Test Driven Development (TDD), Unit Testing, Testability, Test Case, Software Testing, Eclipse (Software), Test Data, Development Testing, Test Automation, Test Execution Engine, Integrated Development Environments, Java, Test Tools
Intermediate · Specialization · 1 - 3 Months

IBM
Skills you'll gain: COBOL (Programming Language), Report Writing, Debugging, Programming Principles, Software Testing, Computer Programming, Maintainability, Business Logic, Software Engineering, Data Storage, Numerical Analysis
Beginner · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: ASP.NET, .NET Framework, C# (Programming Language), Object Oriented Programming (OOP), Web Development, Web Applications, Object Oriented Design, Application Frameworks, Programming Principles, Development Environment, Debugging
Beginner · Course · 1 - 4 Weeks

Edureka
Skills you'll gain: Identity and Access Management, Cloud Engineering, Cloud Services, Cloud Hosting, Cloud Solutions, Cloud Management, User Provisioning, Authentications, Data Storage
Intermediate · Course · 1 - 3 Months

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

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

Whizlabs
Skills you'll gain: Multi-Factor Authentication, Role-Based Access Control (RBAC), Authentications, Azure Active Directory, Zero Trust Network Access, Identity and Access Management, User Provisioning, Authorization (Computing), Security Controls, Cloud Security, User Accounts, Continuous Monitoring
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: UI Components, .NET Framework, ASP.NET, C# (Programming Language), Application Frameworks, Network Routing, Web Applications, Javascript, Event-Driven Programming, Server Side, Data Modeling
Intermediate · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Java Platform Enterprise Edition (J2EE), Application Deployment, Web Applications, Application Servers, Java, Object-Relational Mapping, Application Development, Web Development, Web Servers, Server Side, Application Frameworks, Scripting, Middleware, Javascript and jQuery, Data Storage, Apache Tomcat, Session Initiation Protocols, Enterprise Architecture, Hypertext Markup Language (HTML), Model View Controller
Intermediate · Specialization · 1 - 3 Months
Google Cloud
Skills you'll gain: Google Workspace, Gmail, Google Gemini, Email Automation, Service Management, Scripting, Automation, Document Management, Collaborative Software, Configuration Management, Data Sharing
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Operating System Administration, Network Infrastructure, Data Storage, Command-Line Interface, Peripheral Devices, Software Installation, Active Directory, Technical Support and Services, System Configuration, Cyber Security Assessment
Intermediate · 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, Relational Databases, Databases, Java, Web Servers, SQL, Stored Procedure, Authentications, Web Applications, Secure Coding, Middleware, Software Design Patterns, Data Validation
Intermediate · Course · 1 - 3 Months