2. How can I trust Java Decompiler ??!!

For 100% assurance you need a SCIENTIFIC way to validate and trust the Java Decompiler program. The method described in this section will enable the decompiler program to be accepted as "trust-worthy" and reliable.

In order to verify that the decompiler program is regenerating the Java source-code properly, use the following technique -

Generate the class file from the generated source code using the compiler -

bash$ mv myprogram.class myprogram_orig.class
bash$ javac myprogram.java

Now use the unix 'diff' command to compare the two class files -

bash$ diff myprogram.class myprogram_orig.class

This step gives 100% guarantee and 100% quality assurance and life term or long term WARRANTY on decompiler programs.

It is strongly recommended that you do these steps every time you run decompiler programs.