JavaFX - How to edit a treeView TreeItem to TextField -

i'm trying make treeitems in treeview editable, changing them textfield.

tree.seteditable(true);             tree.setcellfactory(textfieldtreecell.fortreeview());             tree.setoneditcommit(new eventhandler<treeview.editevent<string>>() {                 @override                 public void handle(treeview.editevent<string> t) {                     **//a line add**                     system.out.println("setoneditcommit");                 }             });             tree.setoneditcancel(new eventhandler<treeview.editevent<string>>() {                     @override                     public void handle(treeview.editevent<string> t) {                         system.out.println("setoneditcancel");                     }                 });         } 

can please me in ? couldn't find tutorial treeview, thanks.