JTable row selection

[Kevin Hamrick]

I am trying to give the user the option of selecting a specific row and having the mouseclick return an int value for the row each time they click. It seems from reading the API and other examples that this is something that should be easy to implement but in all honesty I have not been able to do it. I would post my code but I have tried several different things. If someone has done this could you please show me how?
Thanks

[Kevin Hamrick]

Found a solution here right after posting

http://www.iam.ubc.ca/guides/javatut99/uiswing/components/table.html#selection.
This is the code

table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
...
ListSelectionModel rowSM = table.getSelectionModel();
rowSM.addListSelectionListener(new ListSelectionListener() {
    public void valueChanged(ListSelectionEvent e) {
        ListSelectionModel lsm = (ListSelectionModel)e.getSource();
        if (lsm.isSelectionEmpty()) {
            ...//no rows are selected
        } else {
            int selectedRow = lsm.getMinSelectionIndex();
            System.out.println(selectedRow);
        }
    }
});
 

Only problem is, it seems to be executing the else twice for each click. I thought it might be my mouse but I've change the properties and it still calls the else twice. ANy ideas on why?

[jefff willis]

I'm not sure what you're doing but it's not all that difficult.

Maybe you are getting mouse Up and mouse Down events of some sort.

Here is a quick and dirty example:

  
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
import javax.swing.table.*;
 

public class TableListener extends JFrame
{
  JTable table = null;
 
  public TableListener() {
    super("Table example, Wines from Bordeaux");
 
    Object[][] tabledata = {
      { "Chateau Meyney, St. Estephe",    new Integer(1994), "$18.75"},
      { "Chateau Montrose, St. Estephe",    new Integer(1975), "$54.25" },
      { "Chateau Gloria, St. Julien",    new Integer(1993), "$22.99" },
      { "Chateau Beychevelle, St. Julien",   new Integer(1970), "$61.63" },
      { "Chateau La Tour de Mons, Margeaux", new Integer(1975), "$57.03" },
      { "Chateau Brane-Cantenac, Margeaux",  new Integer(1978), "$49.92" },
    };
 
    String columnheaders[] = { "Wine", "Vintage", "Price" };
 
    table = new JTable(tabledata, columnheaders);
    table.setPreferredScrollableViewportSize(new Dimension(300, 150));
    table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
 

    JScrollPane scrollPane = new JScrollPane(table);
 
    getContentPane().add(scrollPane);
 
    addWindowListener(new WindowAdapter()
    {
      public void windowClosing(WindowEvent we) {
        System.exit(0);
      }
    });
 
    MyMouseListener MML = new MyMouseListener();
    table.addMouseListener(MML);
 
    pack();
  }
 
  public static void main(String []args)
  {
    TableListener tlb = new TableListener();
    tlb.show();
  }
 

  private class MyMouseListener extends java.awt.event.MouseAdapter
  {
    public void mouseClicked( java.awt.event.MouseEvent e)
    {
      System.out.println("selected row = " + table.getSelectedRow());
    }
  }
 
}