java.lang.ClassFormatError: Bad major version number

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java.lang.ClassFormatError: Bad major version number
at java.lang.ClassLoader.defineClass(ClassLoader.java:230)
at java.lang.ClassLoader.defineClass(ClassLoader.java:208)
at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:591)
at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:226)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:318)
at oracle.forms.handler.UICommon.instantiate(Unknown Source)
at oracle.forms.handler.UICommon.onCreate(Unknown Source)
at oracle.forms.handler.JavaContainer.onCreate(Unknown Source)
at oracle.forms.engine.Runform.onCreateHandler(Unknown Source)
at oracle.forms.engine.Runform.processMessage(Unknown Source)
at oracle.forms.engine.Runform.processSet(Unknown Source)
at oracle.forms.engine.Runform.onMessageReal(Unknown Source)
at oracle.forms.engine.Runform.onMessage(Unknown Source)
at oracle.forms.engine.Runform.processEventEnd(Unknown Source)
at oracle.ewt.lwAWT.LWComponent.redispatchEvent(Unknown Source)
at oracle.ewt.lwAWT.LWComponent.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Component.java:1819)
at java.awt.Container.dispatchEventImpl(Container.java:946)
at java.awt.Component.dispatchEvent(Component.java:1751)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:1848)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:1637)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:1538)
at java.awt.Container.dispatchEventImpl(Container.java:933)
at java.awt.Component.dispatchEvent(Component.java:1751)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:85)

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