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: Azure Synapse Analytics, Data Migration, Microsoft Azure, Data Warehousing, SQL Server Integration Services (SSIS), Microsoft SQL Servers, Cloud Security, Performance Tuning, System Configuration, Cloud Storage, Cloud Computing Architecture, Data Security, Apache Spark, Data Integration
Intermediate · Course · 1 - 3 Months

Scrimba
Skills you'll gain: Web Applications, Javascript, Other Programming Languages, UI Components, Front-End Web Development, Web Development, Object Oriented Programming (OOP), Cascading Style Sheets (CSS), Programming Principles
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Digital Marketing, Market Analysis, Branding, Product Lifecycle Management
Mixed · Course · 1 - 3 Months

Packt
Skills you'll gain: Ruby on Rails, Model View Controller, Ruby (Programming Language), Object-Relational Mapping, Test Automation, Restful API, Application Deployment, Web Applications, Web Development, Authentications, Development Environment, Data Validation
Beginner · Course · 1 - 4 Weeks
University of Michigan
Skills you'll gain: Responsive Web Design, Wireframing, Bootstrap (Front-End Framework), Cascading Style Sheets (CSS), Web Design, HTML and CSS, Web Design and Development, Browser Compatibility, User Interface (UI), Mobile Development, Prototyping, Hypertext Markup Language (HTML), Javascript
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Application Development, User Interface (UI), Software Development Life Cycle, Data Management, User Interface (UI) Design, File I/O, Application Design, Development Environment, Integrated Development Environments
Intermediate · Course · 1 - 4 Weeks
Coursera
Skills you'll gain: API Testing, Test Script Development, Scenario Testing, Testability, Software Testing, Integration Testing, Test Case, Test Automation, Regression Testing, Test Execution Engine, Maintainability, Verification And Validation, User Interface (UI), Security Testing, Test Data, Scalability, Debugging, Authentications, Compliance Reporting, Automation
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Ajax, jQuery, JSON, Debugging, JavaScript Frameworks, Application Programming Interface (API), Web Applications, Javascript, Game Design, HTML and CSS, User Interface (UI) Design
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Equities, Balance Sheet, Financial Accounting, Corporate Finance, Financial Statements, Financial Analysis, Corporate Accounting, Financial Reporting, Accounting, Market Liquidity
Mixed · Course · 1 - 4 Weeks

Microsoft
Skills you'll gain: Data Manipulation, Data Transformation, Tidyverse (R Package), Data Cleansing, Data Preprocessing, R Programming, Data Structures
Beginner · Course · 1 - 4 Weeks

Packt
Skills you'll gain: Data Persistence, API Design, API Testing, Routing Protocols, Javascript, Database Design, Development Environment
Intermediate · Course · 1 - 4 Weeks

EDUCBA
Skills you'll gain: Application Deployment, Configuration Management, Application Performance Management, Application Servers, Model View Controller, UI Components, Virtual Environment
Intermediate · Course · 1 - 3 Months