Tree Applet Not Loading (Doc ID 1504239.1)

Last updated on JANUARY 16, 2017

Applies to:

Oracle WebCenter Sites - Version 7.5.0 and later
Information in this document applies to any platform.

Symptoms

Below are 4 java console errors which would result in the Advance UI tree applet not loading:

1) java.lang.ClassNotFoundException: com.openmarket.tree.TreeAppletLeader.class
    at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
    Exception: java.lang.ClassNotFoundException: com.openmarket.tree.TreeAppletLeader.class
    
2) load: class com.openmarket.tree.TreeAppletLeader.class not found.
java.lang.ClassNotFoundException: com.openmarket.tree.TreeAppletLeader.class
...
Caused by: java.io.IOException: open HTTP connection failed [url to the TreeAppletLeader classes]

3) java.lang.NullPointerException
    at java.util.StringTokenizer.<init>(Unknown Source)
    at java.util.StringTokenizer.<init>(Unknown Source)
    at com.openmarket.tree.TreeApplet.makeColor(TreeApplet.java:160)
    at com.openmarket.tree.TreeApplet.gettabSelectedColor(TreeApplet.java:119)
    at com.openmarket.tree.PaneGroup.initialize(PaneGroup.java:68)
    at com.openmarket.tree.PaneGroup.<init>(PaneGroup.java:146)
    at com.openmarket.tree.TreeApplet.init(TreeApplet.java:299)
    at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

4) java.lang.UnsupportedClassVersionError: com/openmarket/tree/TreeAppletLeader (Unsupported major.minor version 50.0)
...
Exception: java.lang.UnsupportedClassVersionError: com/openmarket/tree/TreeAppletLeader (Unsupported major.minor version 50.0)

Cause

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