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.

Johns Hopkins University
Skills you'll gain: Software Documentation, Leaflet (Software), Data Preprocessing, Technical Documentation, Data Cleansing, Data Visualization Software, Code Review, R Programming, GitHub, Continuous Integration, Software Testing
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Network Troubleshooting, Network Protocols, Network Monitoring, Network Analysis, TCP/IP, Cyber Security Assessment, Network Security, User Interface (UI)
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Hardware Design, Application Specific Integrated Circuits, Electronics Engineering, Engineering Design Process, Electronic Hardware, Electronics, Design, Technical Design, Semiconductors, Computer-Aided Design, Electrical and Computer Engineering, Electronic Systems, Electronic Components, Verification And Validation, Simulation and Simulation Software, Open Source Technology, Schematic Diagrams
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: React.js, Application Deployment, Cloud Deployment, Web Applications, Javascript, Bootstrap (Front-End Framework), Development Environment, User Interface (UI), Cascading Style Sheets (CSS), Application Programming Interface (API)
Beginner · Course · 1 - 3 Months

Alibaba Cloud Academy
Skills you'll gain: Data Visualization Software, Big Data, Apache Hadoop, Apache Spark, Apache Hive, Distributed Computing, Data Processing, Data Warehousing, Data Integration, Cloud Security, Cloud Technologies, Artificial Intelligence and Machine Learning (AI/ML), SQL
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Email Automation, Scripting, Google Workspace, Gmail, Web Development Tools, Javascript, Google Cloud Platform, Spreadsheet Software, Web Development
Beginner · Project · Less Than 2 Hours

Skills you'll gain: Content Creation
Beginner · Course · 1 - 4 Weeks

SkillUp
Skills you'll gain: Group Policy, Dynamic Host Configuration Protocol (DHCP), Azure Active Directory, Active Directory, Windows Servers, Hyper-V, iSCSI Configuration, Virtual Private Networks (VPN), Containerization, Microsoft Azure, Kubernetes, Microsoft Windows, Docker (Software), Hybrid Cloud Computing, Virtualization, Virtual Machines, Server Administration, Network Administration, Authentications, Infrastructure As A Service (IaaS)
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Cascading Style Sheets (CSS), Hypertext Markup Language (HTML), Web Applications, Javascript, Web Design, Web Development, Front-End Web Development, Animation and Game Design
Intermediate · Guided Project · Less Than 2 Hours

Illinois Tech
Skills you'll gain: Cloud-Native Computing, Cloud Computing, Amazon Web Services, Infrastructure as Code (IaC), Cloud Computing Architecture, Cloud Platforms, Cloud Storage, Cloud Infrastructure, Cloud Services, Amazon S3, Cloud Applications, Scalability, Database Management, Command-Line Interface, Virtualization, Linux Administration
Build toward a degree
Intermediate · Course · 1 - 3 Months

Case Western Reserve University
Skills you'll gain: Geostatistics, Exploratory Data Analysis, Spatial Data Analysis, Spatial Analysis, Geospatial Mapping, Geospatial Information and Technology, Statistical Modeling, R Programming, Statistical Analysis, Probability & Statistics, Data Analysis, Data-Driven Decision-Making, Regression Analysis, Correlation Analysis, Data Validation, Histogram, Box Plots, Simulation and Simulation Software, Model Evaluation
Beginner · Course · 1 - 3 Months

University of Colorado Boulder
Skills you'll gain: Data-Driven Decision-Making, Descriptive Statistics, Data Analysis, Probability Distribution, Statistical Software, Statistics, R (Software), Data Visualization, Statistical Analysis, Probability, R Programming, Probability & Statistics, Data Manipulation, Histogram, Taxonomy, Data Import/Export
Beginner · Course · 1 - 3 Months