Eclipse Table widget with SWT.CHECK is fireing two events when a TableItem is selected
final Table table = new Table( composite, SWT.BORDER | SWT.SINGLE | SWT.FULL_SELECTION | SWT.CHECK );
table.setHeaderVisible(true);
table.setLinesVisible(false);

(...)

table.addSelectionListener(new SelectionAdapter() {
    public void widgetSelected(SelectionEvent e) {
        CheckThatOnlyOneItemCanBeCheckedAtTime(e.item);
        //If someone check on me, save the item data value in a "container"
        if( e.detail == SWT.CHECK ) {
            MBSCustomPageManager.addPageProperty(PAGE_ID, "SDK_Path", ((ISdk)((TableItem)e.item).getData()).getPath() );
        } else { //Otherwise, unset the saved value
            MBSCustomPageManager.addPageProperty(PAGE_ID, "SDK_Path", "" );
        }
    }
});

table.addListener(SWT.Selection, new Listener() {
       public void handleEvent(Event arg0) {
       String string = arg0.detail == SWT.CHECK ? "Checked"
                                                : "Selected";
              if (arg0.detail == SWT.CHECK)
                   System.out.println(arg0.item + " " + string+":"+((Table)arg0.widget).getSelection()[0].getChecked());
              else
  System.out.println(arg0.item + " " + string);
                                   }
                });