title: how to run or install a *.jar file in windows?
body: <p>I have downloaded <code>jbpm-installer-3.2.7.jar</code> but I don't know how to install or run the file.</p>
  
  <p>If I double click on it, it opens in <code>winrar</code>. I tried installing through command prompt, but I got the following errors:</p>
  
  <pre><code>C:\Documents and Settings\ccuser\Desktop\manoj&gt;java -jar jbpm-installer-3.2.7.jar
  
  Exception in thread "main" java.lang.UnsupportedClassVersionError: com/izforge/izpack/installer/Installer (Unsupported major.minor version 49.0)
      at java.lang.ClassLoader.defineClass0(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$1.run(Unknown Source)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(Unknown Source)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      at java.lang.ClassLoader.loadClassInternal(Unknown Source)
  </code></pre>