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: Git (Version Control System), GitHub, Version Control, Open Source Technology, Bash (Scripting Language), Unix Shell, Collaborative Software, Software Installation, Unix Commands, Microsoft Visual Studio, Software Versioning, Linux Commands, Linux, File Systems, Mac OS, Web Development Tools, Shell Script, File Management, Application Deployment, React.js
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Node.JS, JavaScript Frameworks, Web Frameworks, Authentications, MongoDB, Postman API Platform, Restful API, Server Side, Middleware, JSON, Application Programming Interface (API), Web Development Tools, Web Applications, Javascript, Back-End Web Development, API Testing, NoSQL
★ 4.9 (22) · Intermediate · Course · 1 - 3 Months

Packt
Skills you'll gain: Linux, Linux Administration, Linux Commands, File Management, Linux Servers, User Accounts, Operating System Administration, File Systems, OS Process Management, Unix Shell, Command-Line Interface, User Provisioning, General Networking, Shell Script, Operating Systems, Remote Access Systems, Scripting, Dataflow, System Monitoring
★ 4.6 (10) · Intermediate · Course · 1 - 3 Months

Xi'an Jiaotong University
Skills you'll gain: ASP.NET, .NET Framework, Hypertext Markup Language (HTML), Cascading Style Sheets (CSS), Web Development, Database Application, Application Frameworks, Object Oriented Programming (OOP), Web Applications, Object Oriented Design, Database Development, Javascript, Back-End Web Development, HTML and CSS, Web Design, Scripting Languages, Data Access, Web Servers, Scripting, Event-Driven Programming
★ 4.7 (6) · Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Matplotlib, Linear Algebra, Plot (Graphics), Data Visualization, NumPy, Scientific Visualization, Machine Learning Algorithms, Statistical Visualization, Pandas (Python Package), Applied Machine Learning, Data Science, Machine Learning, Data Analysis, Python Programming, Model Optimization, Data Manipulation, Classification Algorithms, Programming Principles, Regression Analysis, Data Structures
Beginner · Course · 1 - 3 Months

Skills you'll gain: Test Driven Development (TDD), Unit Testing, Development Testing, Test Script Development, Test Case, Software Testing, Python Programming, File I/O
★ 4.1 (9) · Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Git (Version Control System), Version Control, GitHub, Jupyter, Python Programming, Programming Principles, Software Versioning, Data Science, Generative AI, Development Environment, Computer Programming, Data Analysis
★ 4.3 (7) · Beginner · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Software Design Patterns, Object Oriented Programming (OOP), Object Oriented Design, Programming Principles, Software Design, Algorithms, Software Architecture, Computer Programming, Python Programming, Model View Controller
★ 4.5 (40) · Beginner · Course · 1 - 4 Weeks

Scrimba
Skills you'll gain: Javascript, JavaScript Frameworks, Program Development, Web Development, Angular, Vue.JS, Application Development, React.js, Web Applications, Event-Driven Programming, Object Oriented Programming (OOP), Programming Principles, Computer Programming, Data Structures, Software Engineering, Computer Science
★ 4.6 (25) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Spatial Data Analysis, Spatial Analysis, GIS Software, Geographic Information Systems, Geospatial Information and Technology, Geospatial Mapping, Data Analysis Software, Data Mapping, Data Management, Data Import/Export, Data Integration, Data Access
Beginner · Course · 1 - 3 Months

JetBrains
Skills you'll gain: Vibe coding, Generative AI Agents, Prompt Engineering, Game Design, Code Review, 3D Assets, Animation and Game Design, 3D Modeling, Integrated Development Environments, Artificial Intelligence, Generative AI, Project Planning, Javascript, Software Development, Product Development, Web Development, Product Design, Animations, Visual Design, Interactive Data Visualization
★ 4.9 (18) · Beginner · Course · 1 - 4 Weeks

National Taiwan University
Skills you'll gain: Exploratory Data Analysis, Regression Analysis, R Programming, Statistical Analysis, Statistical Programming, R (Software), Statistical Modeling, Business Analytics, Analytics, Data Analysis, Statistics, Statistical Methods, Predictive Modeling, Statistical Inference, Data Transformation, Estimation, Statistical Hypothesis Testing, Model Evaluation
★ 5 (6) · Intermediate · Course · 1 - 3 Months