JTree Listener problem!

Question

I have the following JTree:
[root] project
[node1] car
[node2 = child of node1] car_Info
[children of node2] color, length, engine, price, etc...(about 80 items)
I use polymorphism to implement this:
public interface NodeInfo {
public void select();
public class car implements NodeInfo {
// rest of car class
public void select() {
// car specific implementation
public class car_Info implements NodeInfo {
// rest of car_info
public void select() {
// car_info specific implementation
public void valueChanged(TreeSelectionEvent e) {
DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
if (node == null) {
return;
NodeInfo nodeInfo = (NodeInfo) node.getUserObject();
nodeInfo.select(); // dynamic call to the actual runtime subtype of the NodeInfo object
How do i implement the leafs for my tree? (that is, color, length, etc....) And how can i put that into my valueChanged method?

Answer 1

I have the following JTree:
[root] project
[node1] car
[node2 = child of node1] car_Info
[children of node2] color, length, engine, price,
etc...(about 80 items)
I use polymorphism to implement this:
public interface NodeInfo {
public void select();
public class car implements NodeInfo {
// rest of car class
public void select() {
// car specific implementation
public class car_Info implements NodeInfo {
// rest of car_info
public void select() {
// car_info specific implementation
public void valueChanged(TreeSelectionEvent e) {
DefaultMutableTreeNode node =
e = (DefaultMutableTreeNode)
tree.getLastSelectedPathComponent();
if (node == null) {
return;
NodeInfo nodeInfo = (NodeInfo)
fo) node.getUserObject();
nodeInfo.select(); // dynamic call to the actual
ual runtime subtype of the NodeInfo object
How do i implement the leafs for my tree? (that is,
color, length, etc....) And how can i put that into
my valueChanged method?the valueChanged method exists only to allow the model to notify the view that it has changed, so that the view may change accordingly
I don't understand what you mean with your last sentence