Steps to reroduce:
Compile and run the attached testcase.
Double clik on the header of the table, multiple times.
Observed behavior
Nothing happens, the table is not sorted.
Note:This behavior can sometimes be slightly itermittent, depending on the clicking speed of the user.
Expected behavior
The table should get sorted.
on Windows, in the windows file explorer, double cliking sorts the file view.
The end user would expect the same in Jtable. One of the motivation of this table feature was to allow sorting through java api as in an explorer and thereby get closer to native behavior.
----------BEGIN SOURCE----------

import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.table.TableCellEditor.*;
import java.awt.event.*;
import java.awt.event.KeyEvent.*;
class IAMATEST extends JPanel {
public IAMATEST() {
 String table_data[][] = { {"Comedy", "Kindergarten Cop", "1990"},
 {"SciFi", "Total Recall", "1990"},
 {"Action", "Eraser", "1996"} };
 String column_headers[] = {"Genre", "Title", "Year"};
 String combo_items[] = {"Stallone","Schwarzenegger"};
 DefaultTableModel dft = new DefaultTableModel(table_data, column_headers);
 JTable tbl_movies = new JTable(new DefaultTableModel(table_data, column_headers));
 tbl_movies.setColumnSelectionAllowed(false);
 tbl_movies.setRowSelectionAllowed(false);
 tbl_movies.setCellSelectionEnabled(true);
 tbl_movies.setRowHeight(25);
 tbl_movies.setRowSorter(new TableRowSorter(dft));
 JScrollPane jsp = new JScrollPane();
 jsp.getViewport().add(tbl_movies);
 jsp.setSize(600, 250);
 this.add(jsp);
}
public static void main(String args[]) {
 JFrame jf = new JFrame();
 jf.add(new IAMATEST());
 jf.setSize(800, 400);
 jf.setVisible(true);
}
}

----------END SOURCE------------