How to make a JTree have multiple layers.

I was able to get children but how do I get grandchildren?

I was able to do it with arrays, but it has the unacceptable side effect of having the array toString as the name, which isn't what I want.

I've tried the JTree(TreeNode) constructor but when I tried something like this:

names.add("Bob");
names.add("Mike");
names.add("Jim");

DynamicUtilTreeNode dutn = new DynamicUtilTreeNode("Bubba", names);

Object[] values = new Object[3];

values[0] = dutn;
values[1] = "Abanca";
values[2] = "Davama";

DynamicUtilTreeNode dutn2 = new DynamicUtilTreeNode("Rilli", values);

jt = new JTree(dutn2);

And it's not showing the third level.

Bubba's children aren't showing up.