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.

University of Minnesota
Skills you'll gain: Clinical Leadership, Nursing Management, Leadership, Nursing Administration, Nursing, Health Informatics, Innovation, Systems Thinking, Self-Awareness, Personal Development
★ 4.6 (49) · Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Data Persistence, Data Presentation, Big Data, Analytics, Data Processing, Data Analysis, Data Storage Technologies, Data Strategy, Data Storage, Data Integrity, Data Management, Data Infrastructure, Unstructured Data, Data Import/Export, Real Time Data, Data Collection
★ 3.9 (31) · Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Data Analysis, Machine Learning Algorithms, Statistical Analysis, Probability & Statistics, Probability Distribution, R Programming, Machine Learning Methods, Statistical Methods, R (Software), Applied Machine Learning, Statistical Machine Learning, Statistics, Statistical Modeling, Machine Learning, Statistical Inference, Classification Algorithms, Statistical Programming, Correlation Analysis, Data Manipulation, Supervised Learning
★ 4.6 (16) · Mixed · Course · 1 - 4 Weeks

Skills you'll gain: JUnit, Spring Framework, Spring Boot, Java Programming, Java, Apache Maven, Hibernate (Java), Unit Testing, Gradle, Microservices, Build Tools, Object-Relational Mapping, Software Testing, Cloud Development, Functional Design
Intermediate · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Version Control, GitHub, Git (Version Control System), Data Transformation, Data Science, Data Analysis, R (Software), R Programming, Software Installation
★ 4.7 (107) · Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Statistical Hypothesis Testing, Logistic Regression, Lean Six Sigma, Correlation Analysis, Six Sigma Methodology, R (Software), R Programming, Statistical Programming, Statistical Analysis, Test Tools, Statistical Methods, Statistical Software, Regression Analysis, Probability & Statistics, Data Literacy, Data Science
★ 4.6 (14) · Intermediate · Guided Project · Less Than 2 Hours

Coursera
Skills you'll gain: Data Manipulation, Tidyverse (R Package), Data Wrangling, Data Analysis, R Programming, R (Software), Data Transformation, Statistical Analysis
★ 4.6 (22) · Beginner · Guided Project · Less Than 2 Hours

Board Infinity
Skills you'll gain: Restful API, ASP.NET, Microsoft SQL Servers, C# (Programming Language), Web Services, Database Management, Database Development, JSON, Back-End Web Development, SQL, Database Design, Server Side, .NET Framework, Object Oriented Programming (OOP), Application Programming Interface (API), API Design, Database Architecture and Administration, Programming Principles, Object Oriented Design
★ 4.1 (14) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: R Programming, R (Software), Data Visualization, Statistical Programming, Time Series Analysis and Forecasting, Interactive Data Visualization, Data-Driven Decision-Making, Trend Analysis, Rmarkdown, Data Processing, Data Analysis, Predictive Modeling, Data Cleansing, Data Manipulation, Exploratory Data Analysis, Predictive Analytics, Revenue Management, Forecasting, Business Strategy, Machine Learning
★ 4.9 (12) · Intermediate · Guided Project · Less Than 2 Hours

The Hong Kong University of Science and Technology
Skills you'll gain: HTML and CSS, Cascading Style Sheets (CSS), Hypertext Markup Language (HTML), jQuery, Javascript and jQuery, Web Design and Development, Javascript, Web Development, Animations, Front-End Web Development, Animation and Game Design, Web Applications, Event-Driven Programming, Software Design Patterns
Intermediate · Course · 1 - 3 Months

DeepLearning.AI
Skills you'll gain: Full-Stack Web Development, Retrieval-Augmented Generation, Web Applications, JavaScript Frameworks, React.js, LLM Application, Web Development, Javascript, Tool Calling, Agentic Workflows, Generative AI Agents, Data Persistence
★ 4.7 (16) · Beginner · Project · Less Than 2 Hours

Skills you'll gain: React.js, Jest (JavaScript Testing Framework), Front-End Web Development, Unit Testing, UI Components, Web Development Tools, Code Reusability, Test Script Development, Event-Driven Programming, Javascript, Application Programming Interface (API), Development Testing, Data Sharing
Intermediate · Course · 1 - 3 Months