Setting the Selection Mode of a List Component

 
 // The default mode is MULTIPLE_INTERVAL_SELECTION.
 JList list = new JList(new String[]{"element1",
    "element2", "element3"});
 ListSelectionModel lsm = list.getSelectionModel();
     
 // Only one item can be selected.
 lsm.setSelectionMode(
   DefaultListSelectionModel.SINGLE_SELECTION);
     
 // The selected items must be in a contiguous range.
 lsm.setSelectionMode(
   DefaultListSelectionModel.SINGLE_INTERVAL_SELECTION);
     
 // Multiple ranges of selected items are allowed.
 lsm.setSelectionMode(
   DefaultListSelectionModel.MULTIPLE_INTERVAL_SELECTION);