title: Java JRE versions incompatibilty
body: <p>I have a question regarding the compatibility between different java versions.</p>
  
  <p>On my computer, I have java version "1.7.0_02".
  But when I uploaded the .class and embedded it in a webpage it does not work</p>
  
  <p>I get the error:</p>
  
  <p>"Unsupported major.minor version 51.0"</p>
  
  <p>the heading at the top of the console says:
  "Java Plug-in 1.6.0_31
  Using JRE version 1.6.0_31-b05 Java HotSpot(TM) Client VM"</p>
  
  <p>I would like to ask what is causing the problem. Is it really my java version?
  I mean, I visited the site with the computer I compiled the applet in.</p>