Decompilation is rarely 100% perfect. Information lost during compilation (such as comments, local variable names, and generic types) must be inferred or reconstructed by the decompiler.
The Java ecosystem has evolved. While classic tools exist, modern development requires modern decompilers that handle Java 8+ features (Lambdas, Streams) and modern file formats (JARs, WARs). java class file decompiler
# Run it java -jar cfr-0.152.jar your-file.jar Decompilation is rarely 100% perfect
Decompilation is not a perfect process. Several factors can hinder the quality of the output: local variable names