###@###.### 2002-09-10

J2SE Version (please include all output from java -version flag):
java version "1.4.1-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-beta-b14)
Java HotSpot(TM) Client VM (build 1.4.1-beta-b14, mixed mode)


Does this problem occur on J2SE 1.3 or 1.4? Yes / No (pick one)

- 1.3.1: can expand and collapse node b, but when you expand node c again,
         children nodes of c node wont show, try expand node b again,
         everything are gone.

- 1.4: same problem as following.


Operating System Configuration Information (be specific):
 NT 4.0 SP6a

Bug Description:
 In the following test program the action of expanding and collapsing nodes
 in a large-model tree causes the tree to be displayed incorrectly. When a
 node is expanded the existing children are removed and a new set is added
 in the tree expansion listener. This simulates a larger program where the
 tree is expanded as the user drills down, due to the expense of computing
 the child nodes. Because of the size of the tree, customers have to use
 the large model for performance, but this causes the problem.

Steps to Reproduce (be specific):
1. compile test(TT.java) program
2. run test program
3. expand node c
4. expand node b
5. collapse node b
6. expand node b again
    Node b "disappears" and node c takes its place.
    Node b is really being drawn behind node c.

Note: try on build21, node b will disappear when you try to expand node b.