A DESCRIPTION OF THE REQUEST :
I use MutableTreeNodes to make my own trees, whether or not I end up using them for the JTree swing component. It would be nice to be able to use generics for the class instead of using Objects and type casting.

JUSTIFICATION :
It was very nice to have the data structure classes converted to generics coding in the last release of Java. But it seems that you forgot about the potential data structure usages of the javax.swing.tree.* package. Implementing generics with these classes would make the conversion to generics even more complete than it is now.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
When I initialize a DefaultMutableTreeNode, I'd like to specify it with generics. When I'd like the value at a node, I'd like a custom object E to be returned instead of just plain old Object.
ACTUAL -
Only Objects can be used as values in TreeNodes.

---------- BEGIN SOURCE ----------
DefaultMutableTreeNode node = new DefaultMutableTreeNode( new Pen("permanent"));
Pen p = (Pen)node.getUserObject();

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
DefaultMutableTreeNode node = new DefaultMutableTreeNode( new Pen("permanent"));
Pen p = (Pen)node.getUserObject();