OpenJDK 64-Bit Server VM warning: Ignoring option PermSize; support was removed in 8.0

[EON517]

OpenJDK 64-Bit Server VM warning: Ignoring option PermSize; support was removed in 8.0
OpenJDK 64-Bit Server VM warning: Ignoring option MaxPermSize; support was removed in 8.0
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.eclipse.osgi.internal.baseadaptor.BaseStorage (file:/usr/share/vega/plugins/org.eclipse.osgi_3.8.0.v20120529-1548.jar) to method java.net.URLClassLoader.addURL(java.net.URL)
WARNING: Please consider reporting this to the maintainers of org.eclipse.osgi.internal.baseadaptor.BaseStorage
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

Originally posted by @sandymanner in #156 (comment)

[EON517]

i can't open vega it keeps showing this error please help

[anneborcherding]

Which Java version are you using? You can use sudo update-alternatives --config java to switch to java 8 which is necessary to run Vega.