411 REFERENCE · Wikibooks
Eclipse/FAQ/JRE
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
java.lang.UnsupportedClassVersionError
This is an error caused by mixing JRE versions.
Look for:
./eclipse -vm (last-version-java)
Windows --> Preferences --> Installed JREs
Go Into (Project) --> Alt-Enter (Properties) --> Java Compiler
Links
FAQ How do I run Eclipse?