This script provides a good installation of the official Oracle JDK on Debian
First download jdk-8u60-linux-x64.tar.gz here: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
Then, with you favorit text editor, set a correct download directory in DOWNLOAD_DIR below ("/tpm" here, it could be "~/Download" for you).
Make the script executable:
chmod +x installJDK.sh
Then run it:
./installJDK.sh