Ask Apple

... we had others using OsX with similiar going on - sadly i don't have a Mac myself to do tests - i recommend to search at OsX forums
from what i gathered in different threads about problems with Yosemite and Java 8 some solved their problems by using the JDK and not the JRE
(i think one problem is that the JRE does't create "environmental links" - while the JDK does and the contained jre profits from that)
uninstalling jre8
http://docs.oracle.com/javase/8/docs/te ... l#A1096890 install jdk8
http://docs.oracle.com/javase/8/docs/te ... c_jdk.htmlswitching back to an older version (Apple Java 6 or Oracle Java 7) would prolly make Java Programms work but for the price of insecurity
(Apple) Java 6 is EOL (End of Live = no Security Patches) and Java 7 will have the last patch in April then it's prolly going EoL too
one way might be to uninstall JRE 8 - install Java 7 JDK u75 - and wait whether Java 8 Mac bugfixes in future might help ...http://www.oracle.com/technetwork/java/ ... 80260.html