Java.lang.UnsupportedClassVersionError on MacOS
<p>I am trying to run an Java Applet application that ran fine on Windows XP (using Eclipse IDE) but after I imported the project on MacOS X (Using Eclipse on MacOS too), it fails to run displaying this error:</p>

<p><code>
Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:675)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:316)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)
    at edu.isi.calo.mapping.gui.DieselUtil.(DieselUtil.java:9)
    at edu.isi.diesel.DieselEditor.processSettingsFile(DieselEditor.java:597)
    at edu.isi.diesel.DieselEditor.main(DieselEditor.java:80)
</code></p>

<p>Has anybody faced such a problem? I deleted all the class files and built the whole project again but it still pops up this runtime error.</p>
