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Seems Quartus is having trouble with using its own JRE or something. After upgrading to 14.1.1 I get:
$ elf2hex
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/altera/elf2hex/Elf2hex : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: com.altera.elf2hex.Elf2hex. Program will exit.
This appears to be due to QUARTUS_ROOT pointing at the older installation. Seems like there was a Java 7/8 related problem. Setting QUARTUS_ROOT correctly resolved the issue.
