Java Frameworks are the structures that already have classes and functions defined in them, to which we may add our own code to solve problems. Because the framework is within the programmer's control, we may also say that frameworks use programmer code. By invoking the framework's functions, using inheritance, and adding "callbacks," "listeners," or other Observer pattern implementations, we can use it. In this article, we will be talking about what a java framework is and several java frameworks such as Apache Struts, Apache Spark, Spring, Hibernate, Blade, and a lot more along with their uses and advantages in Java.