i have java 8 , i've been trying use jar package uses jre 6. in 'create java project' used 'use project specific jre' , created run configuration when try set alternate jre 6, 'run' button gets blocked out. not compatible or missing step? i've tried changing path destination, though i'm not sure if relevant problem.
edit: using jar package online source java 6 compatible , trying integrate eclipse mars java 8 installed.
a few items check, under project settings: (most of these can set workspace-wide well)
- java build path > libraries. replace jre system library jdk6 execution environment or alternate jre
- java compiler > jdk compliance. set 1.6
system:
check installed jres , execution environments. make sure jre linked execution environment javase-1.6 (with checkbox).
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