Unpack JDK under windows

unpackjava.bat

@echo off
set JAVA_HOME=d:\opt\jdk
cd /D %JAVA_HOME%

call :treeProcess
goto :eof

:treeProcess
rem Do whatever you want here over the files of this subdir, for example:
for %%i in (*.pack) do (echo "unpacking %%i" & %JAVA_HOME%\bin\unpack200 "%%i" "%%~ni.jar" & del "%%i")
for /D %%d in (*) do (
    rem echo %%d
	cd
    cd %%d
    call :treeProcess
    cd ..
)
exit /b