Changes

3.4.2 Add a "double click" event listener to the <code>StudentsView</code> class <br/>For this, we need to add <code>doubleClick''hookDoubleClick()''</code> method to the </code>StudentsView.java </code>. <br/>The view makes his viewer available as selection provider via the following line:<br/><code>''getSite().setSelectionProvider(viewer);''</code> <br/>This make is possible for the command which opens the editor to get the selection of the view. All workbench parts have a site, which can be accessed via the method <code>getSite()</code>.