That's something useful when you don't have admin rights on your machine. So :
- Download the JDK from Oracle (the Windows version of course)
- Open the file with the archiver (7-zip) and extract its content
- You will get a file tools.zip, extract it in a dedicated folder. This will extract all the jdk files except jar files
- Open a command line and go to this folder. Run the following command that will convert all 'pack' files into 'jar' files : for /r %i in (*.pack) do .\bin\unpack200.exe "%i" "%~pi%~ni.jar"
- Enjoy your new jdk!