Renaming Java elements 
 In this section, you will rename a Java element using refactoring. 
Refactoring actions change the structure of your code without changing its
semantics (behavior). 
  -  In the Package Explorer view, select junit.framework/TestCase.java. 
  
-  From its context menu, select Refactor > Rename. 
-  In the New Name field on the Rename Compilation 
    Unit page, type "TestCase2". 
       
 
-  To preview the changes that will be made as a result of renaming the
    class, press Next.
  
-  The workbench analyzes the proposed change and presents you with a preview 
    of the changes that would take place if you rename this 
    resource. Since renaming a compilation unit will affect the import
    statements in other compilation units, there are other compilation units
    affected by the change.  These are shown in a list of changes in the
    preview pane.     
 
-  On the Refactoring preview page, you can scroll through the proposed 
    changes and select or deselect changes, if necessary.  You will
    typically accept all of the proposed changes. 
-  Click Finish  to accept all proposed changes. 
You have seen that a refactoring action can cause many changes in different
compilation units.  These changes can be undone as a group.
  -  In the menu bar, select Edit > Undo Rename Compilation Unit. 
       
 
-  The refactoring changes are undone, and the workbench returns to its previous 
    state. You can undo refactoring actions right up until you change and save 
    a compilation unit, at which time the refactoring undo buffer is cleared. 
  
Refactoring support
 
  Refactoring actions
  Refactoring wizard
  Java preferences