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.

EDUCBA
Skills you'll gain: Model View Controller, Java Platform Enterprise Edition (J2EE), Back-End Web Development, Server Side, Data Access, Apache Tomcat, Application Servers, Relational Databases, Databases, Java, Web Servers, SQL, Authentications, Web Applications, Secure Coding, Software Design Patterns, Data Persistence, Context Management
Intermediate · Course · 1 - 3 Months

Rice University
Skills you'll gain: Dataflow, Java, Distributed Computing, Programming Principles, Application Frameworks, Algorithms, Performance Tuning, Functional Design, Computer Science
Intermediate · Course · 1 - 3 Months

Coursera
Skills you'll gain: Backlogs, Sprint Retrospectives, Agile Project Management, Sprint Planning, Agile Methodology, Team Building, Project Management, Team Management, Project Management Life Cycle, Cross-Functional Collaboration, Case Studies, Prioritization, Continuous Improvement Process, Product Development, Communication
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: AutoCAD, Architectural Drawing, 3D Modeling, Technical Drawing, Engineering Drawings, Visualization (Computer Graphics), Computer-Aided Design, 3D Assets, Drafting and Engineering Design, Architectural Design, Building Design, AutoCAD Civil 3D, As-Built Drawings, Computer Graphics, Design Software, User Interface (UI)
Beginner · Specialization · 1 - 3 Months

Skills you'll gain: WordPress, Development Environment, Content Management Systems, Data Management, PHP (Scripting Language), Database Development, Information Architecture, Application Security, Data Validation
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Angular, Command-Line Interface
Beginner · Course · 3 - 6 Months

Microsoft
Skills you'll gain: Generative AI, Generative Model Architectures, MLOps (Machine Learning Operations), Generative Adversarial Networks (GANs), Model Deployment, Microsoft Azure, PyTorch (Machine Learning Library), Image Analysis, Deep Learning, Model Evaluation, Tensorflow, Prototyping, Image Quality, Time Series Analysis and Forecasting, Forecasting
Intermediate · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Sales Pipelines, Overcoming Objections, Sales Management, Sales Process, Team Motivation, Performance Analysis, Team Performance Management, Sales Training, Sales, Dashboard, Business Ethics, Customer Relationship Management, Team Management, Business Technologies, Business Process Automation, Real Time Data, Cross-Channel Marketing, Forecasting, Compliance Management
Beginner · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Object Oriented Programming (OOP), Java, Object Oriented Design, Java Programming
Intermediate · Guided Project · Less Than 2 Hours

Coursera
Skills you'll gain: Unit Testing, JUnit, Test Case, Testability, Software Testing, Software Development, Software Engineering, Java Programming, Java
Beginner · Guided Project · Less Than 2 Hours

Packt
Skills you'll gain: Java, Object Oriented Design, File I/O, Program Development, Encryption
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Frontend Integration, Javascript and jQuery, Front-End Web Development, Application Programming Interface (API), Event-Driven Programming, Development Environment
Beginner · Course · 1 - 3 Months