getBoolean(String str) and valueOf(String str) of Boolean class gives different output

                                     The API-documentation is your friend.

• Boolean.getBoolean probably doesn’t do what you think it does:

  Returns true if and only if the system property named by the argument exists and is equal to the string “true”.

• Boolean.valueOf is probably what you’re looking for:

  The Boolean returned represents the value true if the string argument is not null and is equal, ignoring case, to the string “true”.