I don't remember off the top of my head whether local variables within a function will have their names preserved (probably not) but all class variables and met

I don't remember off the top of my head whether local variables within a function will have their names preserved (probably not) but all class variables and methods will have their names preserved, unless you use an obfuscater. I haven't played around with Java decompilers, but I have sat down with a hex editor before and played with Java class files, and I could see all the strings!