title: "A java exception has occurred" when opening .jar
body: <p>I've made a client for my game and I wanted to jar it, I used jarmaker and did I'm sure I did everything correctly, but when I try to open the .jar file, it says "A java exception has occurred" any help is appreciated.</p>
  
  <pre><code>Exception in thread "main" java.lang.UnsupportedClassVersionError: client : Unsupported major.minor version 52.0
      at java.lang.ClassLoader.defineClass1(Native Method)
      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$100(Unknown Source)
      at java.net.URLClassLoader$1.run(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)
      at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
  </code></pre>
  
  <p>Press any key to continue . . .</p>