First Batch Script setlocal EnableDelayedExpansion

Needed to create a batch script to kick off a Java program. Had never written a batch script before and had some troubles getting the class path set properly. The code I was using was:

@echo on
if "%JAVA_HOME%"=="" (
echo The JAVA_HOME environment variable is not set.
goto end
)

set TEMP_CLASSPATH=.;
for %%i in (..\lib\*.jar) do (
set TEMP_CLASSPATH=!TEMP_CLASSPATH!;%%i
)

set TEMP_CLASSPATH=!TEMP_CLASSPATH!.;
echo %TEMP_CLASSPATH%

java -cp %TEMP_CLASSPATH% com.amphibiousrodents.MyJavaProgram
pause

I wrote it in Windows XP (not sure if this has any bearing on anything). When I ran this script from my Eclipse project's /bin folder it was causing a java.lang.NoClassDefFoundError

After some digging around someone mentioned that adding a line:
setlocal EnableDelayedExpansion would do the trick. After adding that into the .bat file at the top, the classpath was properly set and the program ran without problem. setlocal EnableDelayedExpansion......hmmmm......shoe