Java web” typically refers to the development of web applications using the Java programming language. Java is a popular choice for web development due to its platform independence, robustness, and extensive ecosystem of libraries and frameworks.

Here are some key aspects of Java web development:

1. Servlets: Java Servlets are the foundation of Java web applications. They are server-side components that process requests and generate responses based on the Java platform.
2. JavaServer Pages (JSP): JSP is a technology that allows embedding Java code inside HTML pages. It simplifies the process of creating dynamic web content and is often used in combination with servlets.
3. Frameworks: There are various Java-based web frameworks that facilitate rapid development and provide useful abstractions. Some popular ones include Spring Framework, JavaServer Faces (JSF), Struts, and Play Framework.
4. Persistence: Java provides various APIs and frameworks for database connectivity and ORM (Object-Relational Mapping) solutions like Hibernate, JPA (Java Persistence API), etc.
5. Web Servers and Containers: Java web applications are deployed on web servers or containers like Apache Tomcat, Jetty, WildFly (formerly JBoss), and others.
6. Security: Java web applications need to address security concerns like authentication, authorization, and protecting against common web vulnerabilities (e.g., SQL injection, cross-site scripting).
7. RESTful Web Services: Java can be used to build RESTful APIs using frameworks like JAX-RS (Java API for RESTful Web Services) or Spring Boot.
8. Front-end Integration: Java web applications often integrate with front-end technologies like HTML, CSS, JavaScript, and various JavaScript frameworks (e.g., Angular, React, Vue.js) to create rich and interactive user interfaces.
9. Testing: Java web applications should be thoroughly tested using tools like JUnit for unit testing, Selenium for functional testing, and other testing frameworks.

Overall, Java provides a solid foundation for building scalable and reliable web applications. The choice of specific technologies and frameworks depends on the requirements of the project and the preferences of the development team.