Problem/Bug Bukkit won't launch on Amazon EC2 Linux

This is the error message I keep receiving whenever I try and launch the server.

Exception in thread "main" java.lang.UnsupportedClassVersionError: org/bukkit/craftbukkit/Main : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:803)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:14 2)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:442)
at java.net.URLClassLoader.access$100(URLClassLoader.java:64)
at java.net.URLClassLoader$1.run(URLClassLoader.java:354)
at java.net.URLClassLoader$1.run(URLClassLoader.java:348)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:347)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:323)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

Then it brings me back to the terminal where I can re-launch, and it does the same thing. I checked, and I have Java 8 installed. Any ideas?

Problem fixed!

Just do
sudo update-alternatives --config java

And select the java verison you want.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.