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.

Peking University
Skills you'll gain: C# (Programming Language), Object Oriented Programming (OOP), C and C++, .NET Framework, Data Access, Microsoft Visual Studio, Extensible Markup Language (XML), Data Structures, Database Management, Algorithms, User Interface (UI), Network Model, Application Development, Computer Graphics, File Management
Intermediate · Course · 3 - 6 Months

LearnQuest
Skills you'll gain: JUnit, Testability, Unit Testing, Software Testing, Test Case, Test Tools, Java
Intermediate · Course · 1 - 4 Weeks

Edureka
Skills you'll gain: PySpark, Apache Spark, Data Management, Distributed Computing, Apache Hadoop, Data Processing, Data Analysis, Exploratory Data Analysis, Python Programming, Scalability
Beginner · Course · 1 - 4 Weeks

University of Michigan
Skills you'll gain: Health Disparities, Health Equity, Social Justice, Community Health, Social Determinants Of Health, Public Health, Health Systems, Healthcare Industry Knowledge, Diversity Awareness, Health Care, Diversity Equity and Inclusion Initiatives, Health Policy, Medicaid, Sociology, Continuous Quality Improvement (CQI), Managed Care, Workplace inclusivity, Medicare, Cultural Diversity, Biology
Beginner · Specialization · 3 - 6 Months

Scrimba
Skills you'll gain: Responsive Web Design, HTML and CSS, Hypertext Markup Language (HTML), Typography, Cascading Style Sheets (CSS), Web Design, Web Development Tools, Browser Compatibility, Application Deployment, Front-End Web Development, Web Design and Development, Web Development, Animations, Software Development Tools, UI Components, User Interface and User Experience (UI/UX) Design, Usability, Javascript, Maintainability, Interactive Design
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Shiny (R Package), Data Presentation, Exploratory Data Analysis, Data Wrangling, Predictive Modeling, Tidyverse (R Package), Data Science, Data Collection, Interactive Data Visualization, Data Manipulation, Dashboard, Data Analysis, Data Cleansing, R Programming, Statistical Modeling, Regression Analysis, Ggplot2, Data Visualization, Data Transformation, Predictive Analytics
Intermediate · Course · 1 - 3 Months

Illinois Tech
Skills you'll gain: Statistical Analysis, Time Series Analysis and Forecasting, Data Analysis, Machine Learning Algorithms, Data Visualization, Exploratory Data Analysis, Statistical Programming, Statistical Methods, Statistical Machine Learning, Data Cleansing, Analytics, Regression Analysis, R (Software), Statistical Software, Forecasting, Data Science, Statistical Modeling, Supervised Learning, Statistical Inference, Machine Learning
Build toward a degree
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Power BI, Microsoft Azure, Data Lakes, Data Analysis Expressions (DAX), Azure Synapse Analytics, Data Modeling, Data Governance, Data Warehousing, Microsoft SQL Servers, Data Analysis, Extract, Transform, Load, Data Integration, Data Import/Export, Real Time Data, Data Transformation, Data Pipelines, Information Management, Role-Based Access Control (RBAC), Performance Tuning
Intermediate · Course · 1 - 4 Weeks

Scrimba
Skills you'll gain: TypeScript, Event-Driven Programming, Javascript, JavaScript Frameworks, Pseudocode, Computational Thinking, JSON, Web Development, Web Applications, Data Import/Export, Application Development, Mobile Development, Debugging, Algorithms, Data Structures, Object Oriented Programming (OOP), Data Management, Programming Principles, Unit Testing, Web Development Tools
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Apache Kafka, Command-Line Interface, Apache, Data Pipelines, Java, Enterprise Application Management, Real Time Data, Performance Tuning, Configuration Management
Intermediate · Course · 3 - 6 Months

Skills you'll gain: Spring Framework, Spring Boot, Model View Controller, Hibernate (Java), Java, Web Applications, Object-Relational Mapping, Application Deployment, Application Security, Database Application, Software Development Tools, Authentications, Development Environment, Authorization (Computing), Query Languages
Intermediate · Course · 3 - 6 Months

Skills you'll gain: Responsive Web Design, HTML and CSS, JSON, React.js, Jest (JavaScript Testing Framework), Hypertext Markup Language (HTML), Javascript, Bootstrap (Front-End Framework), Ajax, Web Design, Web Development Tools, Web Design and Development, Cascading Style Sheets (CSS), Unit Testing, UI Components, User Interface and User Experience (UI/UX) Design, Web Development, Front-End Web Development, Mobile Development, JavaScript Frameworks
Beginner · Specialization · 3 - 6 Months