I am trying to update my eclipse environment to java 8. I installed the jdk and jre version 8. I also did this:
https://wiki.eclipse.org/JDT/Eclipse_Java_8_Support_For_Kepler
then in project -> properties -> java build path -> JRE system libraries -> edit -> execution environment -> JavaSE-1.8(unbound) which is the only option that has java 8 in its name. but when I select it it says : No JREs in workspace compatible with specified execution environment: JavaSE-1.8