If you visit Java (oracle) web page, you may see that a latest version is available for download jre-8u20-ea-bin-b23-macosx-x86_64-15_jul_2014.dmg
But it has been noticed that the download speeds reaches to 0 kb/s and stops.
I tried downloading the Setup from another Internet Connection (ISP) on a different System, yet having the same issue.
After a bit of reading i saw a note at the bottom of the download page that says,
International Use Restrictions
Due to limited intellectual property protection and enforcement in certain countries, the JDK source code may only be distributed to an authorized list of countries. You will not be able to access the source code if you are downloading from a country that is not on this list. We are continuously reviewing this list for addition of other countries.
So its seems like its a Early Access release and not available in all countries yet.
It seems that I am able to download the dmg file for Java, the speed seems to be fluctuating from 0kbps to my bandwidth. So you need wait for some time so that the download continues though slow.
So to conclude it may be some issue with the dmg hosted servers.