What is the use of @builder annotation?

The @Builder annotation produces complex builder APIs for your classes. @Builder lets you automatically produce the code required to have your class be instantiable with code such as: Person.Click to see full answer. Regarding this, what is Lombok jar?Lombok is a open source library (basically a standalone jar) which is capable of doing magic in automating the boilerplate code generation for any java class.Subsequently, question is, how does Lombok generate code? In short, Lombok doesn’t actually generate code at all. Instead, it uses unspecified and undocumented internal compiler implementation api calls to directly modify the program’s abstract syntax tree between reading the source code and outputting compiled bytecode. Also asked, what does Lombok builder do? Builder Pattern is one of the Design Pattern in Java, It reduces the number of parameters required for a constructor or method invocation via custom types and parameter objects. What is Lombok? Lombok is a dependency for reducing boilerplate code for model/data objects.What is the use of Lombok jar?Lombok is used to reduce boilerplate code for model/data objects, e.g., it can generate getters and setters for those object automatically by using Lombok annotations. The easiest way is to use the @Data annotation.