I am using ECLIPSE KEPLER for java programing. When I press (Ctrl+Z) it working fine and easily undo the history but the problem is when I press (Ctrl+Y) , this is not working to re-undo the history. Before KEPLER I use INDIGO it's accept above tags but how I reach it in KEPLER.
Go to Eclipse Preferences, then General->Keys .
Type 'redo' into the textbox and check if the binding is correct. If it is, then check for conflicts (they are shown in the lower right.)