Compile CLASSPATH in a Windows batchfile

Question

On a Unix systems it's very easy to compile the CLASSPATH by using find:

LIBDIR=`find lib/ -name \*.jar`
for DIR in $LIBDIR:
do
    CLASSPATH="$CLASSPATH:$DIR"
done

java -classpath $CLASSPATH com.example.MyClass

What would be the aquivalent in a Windows batchfile?

Answer 1

The same can be achieved from Windows XP on with:

setlocal ENABLEDELAYEDEXPANSION
FOR /R .\lib %%G IN (*.jar) DO set CLASSPATH=!CLASSPATH!;%%G

java -classpath %CLASSPATH% com.example.MyClass

Answer 2

The only way to do it is to use delayed environment variable expansion. You can do that by running

cmd /v

Then you can run:

set var=.
FOR /r %%d IN (*.jar) DO SET var=!var!;%%d
set CLASSPATH=%var%