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: Microsoft Azure, Infrastructure As A Service (IaaS), Network Administration, Network Infrastructure, Cloud Deployment, Cloud Computing, Data Storage, Cloud Management, Network Planning And Design, Dashboard Creation, Cloud Platforms
★ 4.4 (512) · Beginner · Course · 1 - 3 Months

KodeKloud
Skills you'll gain: Network Administration, DevOps, Software Development Tools, Networking Hardware, Network Troubleshooting, Command-Line Interface, Web Development, Cloud Applications, Development Environment, Virtualization and Virtual Machines, Network Routers, Virtual Machines, Virtual Environment, Virtualization, Dependency Analysis, Software Development
★ 4.7 (125) · Beginner · Course · 1 - 4 Weeks

Saïd Business School, University of Oxford
Skills you'll gain: Machine Learning Methods, Financial Services, Artificial Intelligence, Responsible AI, FinTech, Financial Data, Banking Services, Decision Intelligence, Financial Regulation, Banking, Fraud detection, Machine Learning, Data Ethics, Natural Language Processing, AI Personalization, Deep Learning, Credit Risk, Case Studies, Algorithms, Data Management
★ 4.7 (90) · Beginner · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: Professionalism, Courage, Personal Integrity, Culture Transformation, Professional Development, Leadership, Culture
★ 4.7 (88) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Node.JS, Restful API, Database Design, Database Development, Database Application, NoSQL, MongoDB, Back-End Web Development, Performance Tuning, API Design, Cloud Applications, Relational Databases, Authentications, Server Side, Application Programming Interface (API), Cloud Development, Cloud Deployment, Middleware, Scalability, Javascript
★ 4.5 (55) · Intermediate · Course · 1 - 3 Months
Skills you'll gain: Performance Tuning, Django (Web Framework), Authentications, Object-Relational Mapping, Cloud Hosting, User Accounts, Development Environment, Application Security, Python Programming
★ 4.6 (116) · Advanced · Course · 1 - 4 Weeks

University of Pennsylvania
Skills you'll gain: Calculus, Integral Calculus, Applied Mathematics, Probability Distribution, Probability & Statistics, Geometry, Probability, Statistical Methods, Torque (Physics), Statistics, Mechanics, Physics
★ 4.9 (286) · Mixed · Course · 1 - 3 Months
École Polytechnique Fédérale de Lausanne
Skills you'll gain: Scala Programming, Programming Principles, Data Structures, Functional Design, Object Oriented Programming (OOP), Other Programming Languages, Object Oriented Design, Computational Logic, Command-Line Interface
★ 4.8 (66) · Intermediate · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Ggplot2, Plot (Graphics), Data Visualization Software, Data Visualization, Interactive Data Visualization, Scatter Plots, Statistical Visualization, Histogram, Graphic and Visual Design, R Programming, Graphic Design, Graphical Tools, R (Software), Data Mapping, Graphing, Spatial Data Analysis, Geospatial Mapping
★ 3.9 (158) · Intermediate · Course · 1 - 3 Months

University of New Mexico
Skills you'll gain: Middleware, Application Frameworks, Web Applications, Model View Controller, Web Frameworks, Version Control, Web Development Tools, Agile Software Development, Git (Version Control System), Software Engineering, Data Store, Web Design and Development, Web Development, Software Development, Agile Methodology, Database Development, User Interface (UI), Back-End Web Development, Ruby on Rails, Javascript
★ 4.3 (143) · Mixed · Course · 1 - 3 Months

Indian Institute for Human Settlements
Skills you'll gain: Economics, Policy, and Social Studies, Policy Development, Public Policies, Economic Development, Policy Analysis, Research, and Development, Policy Analysis, Financial Policy, Behavioral Economics, Political Sciences, Economics, Supply And Demand, Market Dynamics, Public Affairs, Competitive Analysis, Governance, Program Implementation, Decision Making
★ 4.7 (121) · Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Object-Relational Mapping, Java Platform Enterprise Edition (J2EE), Database Design, Data Access, Data Persistence, Java, Relational Databases, Data Mapping, Java Programming, JUnit, SQL, Query Languages, Software Versioning
★ 5 (13) · Intermediate · Course · 1 - 4 Weeks