rebuild a code from a decompiled java code

how to rebuild开发者_运维知识库 a code from a decompiled java code and how to modify the classes whose name contains $ to suit the application

JD is better choice for decompiling than jad. JAD is not updated for many years.

Use a decompiler like JAD. The generated clases like $1 are anonymous classes which JAD should decode for you.