Yosemite Java

[mors]

Just when I thought everything had been running well for months I have encountered a problem.I have just updated to Yosemite on my Mac and following this can't open Minimwatch it comes up with error message that I need to download legacy Java se 6 runtime.I have looked on Java site but am unsure precisely what to download.I fear I may have made the problem worse by checking my Synology NAS I noticed that Java had an update availableI tried to download but update failed and installation failed now showing that Java not there at all Minimserver is still running well and I can still access music on my IPad.Any help would be much appreciated.