Have you tried reinstalling minecraft or even java? Also, can you go to your start window, type in cmd and press enter. Then type "ping mc.ecocitycraft.com". And then use the snippet tool in windows to take a screenshot of that and upload it here.
Yes, delete it and then download a new java from http://www.oracle.com/technetwork/java/javase/downloads/jre7-downloads-1880261.html (windows x64 version with the EXE file)
Yes "CMD" if you are using Windows 7 go to the bottom left and press the windows button and type in "cmd" then hit enter, if you are on Windows 8. Open up the metro interface and type in "cmd" and hit enter Sent from my HTC One using Tapatalk now Free