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: Cloud-Native Computing, Cloud Applications, Cloud Development, Google App Engine, Google Cloud Platform, Serverless Computing, Application Deployment, Cloud Deployment, Application Performance Management, Application Design, Infrastructure as Code (IaC), Cloud API, Data Store, Application Development, API Gateway, Microservices, Authentications, Cloud Storage, Cloud Computing, Debugging
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Program Development
★ 4.9 (25) · Mixed · Course · 1 - 4 Weeks

University of Michigan
Skills you'll gain: Hypertext Markup Language (HTML), Web Content Accessibility Guidelines, HTML and CSS, Web Design, Web Design and Development, Cascading Style Sheets (CSS), Semantic Web, Web Development Tools, Javascript, Responsive Web Design, Web Content, Web Presence, Verification And Validation
Mixed · Course · 1 - 4 Weeks

EDUCBA
Skills you'll gain: Databases, Database Management Systems
★ 4.6 (11) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Ansible, IT Automation, Devops Tools, Linux Commands, Automation, Debugging, YAML, Scripting, Command-Line Interface, Encryption, Amazon Web Services, Code Reusability, Package and Software Management, Software Installation, Configuration Management, File Management
Intermediate · Course · 3 - 6 Months

Packt
Skills you'll gain: Node.JS, Full-Stack Web Development, Web Applications, Authentications, Server Side, JavaScript Frameworks, Back-End Web Development, Restful API, Middleware, Database Application, Dataflow, Data Validation, NoSQL, TypeScript, Application Programming Interface (API), Object-Relational Mapping, Authorization (Computing), MongoDB, Databases, MySQL
★ 4.8 (8) · Intermediate · Course · 1 - 3 Months

Coursera
Skills you'll gain: Web Development Tools, Data Structures, Javascript, Data Access, Programming Principles
Intermediate · Guided Project · Less Than 2 Hours

Board Infinity
Skills you'll gain: Ajax, jQuery, JSON, Javascript and jQuery, Extensible Markup Language (XML), Web Applications, Javascript, Extensible Languages and XML, Event-Driven Programming, Network Protocols
★ 3.9 (11) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Computer Hardware, SQL, Hardware Architecture, General Networking, Database Design, Database Software, Hardware Troubleshooting, Networking Hardware, Database Theory, Databases, Database Management Systems, Computer Networking, Relational Databases, Network Support, Database Management, Network Protocols, Query Languages, Information Technology, Network Routers, Wireless Networks
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Email Automation, Google Sheets, Scripting, Google Workspace, Scripting Languages, Spreadsheet Software, Productivity Software, Automation, Hypertext Markup Language (HTML), Data Access, HTML and CSS, Javascript, Supplier Relationship Management
Beginner · Guided Project · Less Than 2 Hours

Skills you'll gain: Full-Stack Web Development, Node.JS, User Interface (UI), Restful API, Frontend Integration, Back-End Web Development, User Interface (UI) Design, User Accounts, Server Side, Swift Programming, Object-Relational Mapping, Web Development Tools, JavaScript Frameworks, Secure Coding, Data Store, Application Programming Interface (API), API Design, iOS Development, UI Components, Authentications
Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Real Time Data, Dashboard Creation, Dataflow, Data Pipelines, Dashboard, Google Cloud Platform, Data Integration, Cloud-Based Integration, Event-Driven Programming, Capacity Management, Data Processing, Data Presentation, Data Transformation, Scalability
★ 4.1 (15) · Intermediate · Course · 1 - 3 Months