OpenJDK is a fully open-source implementation of the Java SE specification. It is comparable in performance to Oracle and IBM JDKs.
Unfortunately it’s only OpenJDK 8, but if anything lets hope this pushes more people to using Java 1.8 ;D
They have an MSI based installer in the download link below
Download link: http://developers.redhat.com/products/openjdk/overview/
http://developers.redhat.com/blog/2016/06/27/openjdk-now-available-for-windows/