This is a feature of JBuilder SE and Enterprise.
JBuilder provides many types of refactorings:
Refactorings are available from the editor context menu, the Editor menu, and a UML diagram context menu. To refactor, select a symbol or expression, right-click, and choose a refactoring command. Some refactorings display a dialog box and a Refactoring tab in the message pane; other refactorings occur automatically. The Refactoring tab displays a preview of the refactoring.
Before refactoring, JBuilder provides several ways to learn about a symbol. You can find its definition using the Find Definition command on the editor's context menu. You can also find all references to the symbol using the Find References command.
For more information, see:
Building Applications with JBuilder: Refactoring code symbols