Installer of Oracle jdk-7u45-macosx-x64 hangs on Mavericks
You could always proceed at your own risk to install the package using Pacifist, a free download that asks you to donate, as I have done before with Java. It just places the files in and doesn't ask questions, and then you reboot… Really, proceed with caution if you do that. It worked for me on the JDK, but I was in a slightly different situation.