Java is a popular programming language for developing web applications due to its reliability, scalability, and security features. Java web development involves the use of Java frameworks, tools, and libraries to build dynamic and robust web applications.

Some of the popular Java frameworks for web development are:

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• Spring: It is a widely used Java framework for building enterprise-level applications. It provides support for dependency injection, MVC architecture, and integration with different databases.
• Struts: It is an open-source framework that uses the MVC architecture and provides features for building large-scale web applications.
• JavaServer Faces (JSF): It is a Java-based framework for building component-based UIs for web applications. It provides support for different types of components, such as input fields, buttons, and tables.
• Play: It is a lightweight and fast framework for building web applications using Java and Scala. It provides support for RESTful APIs, reactive programming, and real-time web applications.

In addition to these frameworks, Java developers also use popular tools and libraries such as Apache Tomcat, Hibernate, and Apache Maven for building, testing, and deploying web applications.

To get started with Java web development, you can learn the basics of Java programming language, and then move on to learning one or more of the popular Java frameworks mentioned above. There are several online resources and tutorials available to help you learn Java web development, including documentation and community support provided by the framework developers.