Evaluating the First Character of a User Defined Variable is Uppercase - command-line

Question

I have a template document that I want to convert to another file with a user defined name. The following is the code I have pieced together.
rem #echo off
setlocal enableDelayedExpansion
cls
:Check_Filename
set "_Filename="
set /p _Filename=Enter filename to be created:
if not defined _Filename echo You must enter a value. Try again.&goto Check_Filename
set "test=%_Filename:~0,1%"
for %%C in (A B C D E F G H I J K L M N O P Q R S T U V W X Y Z) do if defined test set "test=!test:%%C=!"
if defined test echo Invalid input. Try again.&goto Check_Filename
if not defined test echo %_Filename%
Set "errorlevel="
echo %_Filename% | findstr /i /R ".java" > nul
if %errorlevel% == 0 (
echo Java extention located
type f:\java\Template.txt > f:\java\%_Filename%
echo %errorlevel%
) else (
echo Java extention not located
echo %errorlevel%
type f:\java\Template.txt > f:\java\%_Filename%.java
)
)
It works but because the file is being used to create the backbone of Java script I want the FOR statement to evaluate the case of the first character which it does not presently do. I tried using HEX representation of these characters in the FOR statement as well, but without success.
Could someone please help me?
Thank you.

Answer 1

Try this:
#echo off & setlocal
:Check_Filename
set "_Filename="
set /p "_Filename=Enter filename to be created: "
if not defined _Filename echo You must enter a value. Try again.&goto:Check_Filename
echo(%_Filename:~0,1% | findstr /r "[ABCDEFGHIJKLMNOPQRSTUVWXYZ]" || (echo Invalid input. Try again.&goto:Check_Filename)