java error

when i try and play it says error and this comes up...
"Exception: java.lang.UnsupportedClassVersionError: client : Unsupported major.minor version 51.0
java.lang.UnsupportedClassVersionError: client : Unsupported major.minor version 51.0
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.defineClass(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.defineClassHelper(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.access$100(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.UnsupportedClassVersionError: client : Unsupported major.minor version 51.0
""

Go to http://www.java.com and download the latest java.

i've downloaded the latest java im sure, version 7.7 and the link says only admins can see it by the way!

Type java.com in your address bar.

i think you have to down grade your java. not sure though. @coder, what does the server run on? go to your compiler.java>find what java it runs off>etc.

or

go to client files>playnow.cmd or play.cmd or run.cmd (which ever file that runs the client to play on) and see what java it runs off on.
and then we got the answer.

Change everything what says version 51.0 to 7.7

Just uninstall Java and use the recommended version from java.com

Latest versions of Java are never the best for everything. Sometimes previous versions are far better than later versions.

I think they both work.