what is framework in java

A Java framework is a collection of pre-written code that Java developers use to develop Java applications or web applications. It is a platform for developing software applications and Java programs, and it acts as a skeleton that helps the developer to develop an application by writing their own code. Frameworks are created to be used over and over so that developers can program applications without the manual overhead of creating everything from scratch. Java frameworks may include predefined classes and functions that can be used to process, input, and manage hardware devices, as well as interact with system software. Frameworks are the substance of programming, and they dictate the structure of an application. Some of the most popular Java frameworks are Spring, Hibernate, Struts, Google Web Toolkit (GWT), JavaServer Faces (JSF), Grails, Vaadin, Blade, Dropwizard, and Play.