Decompilation rarely yields a 100% identical copy of the original source code due to optimizations and information stripped by the compiler:
Import the decompiled source output into an IDE. Use global find-and-replace or IDE refactoring tools ( Shift + F6 in IntelliJ) to systematically rename variables and methods as you deduce their actual roles during analysis. 6. Legal and Ethical Considerations
In various jurisdictions (including the United States and the European Union), reverse engineering through decompilation is legally protected under specific "fair use" clauses only if it is performed exclusively to achieve software interoperability, patch critical unaddressed security flaws, or recover lost source code owned entirely by your organization.