I want table list selection listener to be called ONCE

Question

Today I have found that JTable - ListSelectionModel's ListSelectionListener, specifically its
valueChanged() method, is called twice by a single selection. One for mouse press and
another is for the subsequent mouse release.
How could I prevent that and have them call the method only once, for mouse press only?

Answer 1

Here's a small demo:
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
public class TableSelection{
  JFrame frame;
  JTable table;
  JScrollPane jsp;
  public TableSelection(){
    frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container con = frame.getContentPane();
    table = new JTable(10, 5);
    jsp = new JScrollPane(table);
    ListSelectionModel lsm = table.getSelectionModel();
    lsm.addListSelectionListener(new LsListener());
    con.add(jsp);
    frame.setBounds(50, 50, 400, 200);
    frame.setVisible(true);
  public static void main(String[] args){
    new TableSelection();
  class LsListener implements ListSelectionListener{
    public void valueChanged(ListSelectionEvent e){
      System.out.println("selected : " + table.getSelectedRow() + ", "
       + table.getSelectedColumn());
}