Hi Stuart, this is really interesting, thanks! I found something which might be a bug in Japi. The reverse Japi points out the following: field javax.swing.JTree.AccessibleJTree.AccessibleJTreeNode.accessibleParent: missing in jdk15 However, looking at our sources I couldn't find such a field in classpath either. So why does japi think there is such a field? /Roman -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: Dies ist ein digital signierter Nachrichtenteil Url : http://developer.classpath.org/pipermail/classpath/attachments/20060126/cebc562a/attachment.pgp