Using Quick Fix

To use the quick fix feature:

You need to have the Window > Preference > Java > Editor > Problem Indication > Show problems before compiling checkbox selected.
In the Java editor, if you see an error underlined with a squiggly line, position the caret inside the underlined range and do one of the following:

Press Ctrl+1 or
From the menu bar, select Edit > Quick Fix

A list of suggested corrections is presented, with a preview displayed when an entry is selected.
Select an entry form the list and press Enter.

If you have the Window > Preference > Java > Editor > Problem Indication > Indicate problems solvable with Quick Fix in vertical ruler checkbox selected, then light bulb icons appear on the left-hand side vertical ruler to indicate Quick Fix'able problems. You can then click on one of the the light bulb icons to invoke Quick Fix.

Note: Occasionally, invoking Quick Fix will not suggest any corrections. A message saying 'No suggestions available' will be displayed in such cases.

Java editor

Using the Java editor

Quick Fix