public class TableCellDemo { 

    public static void main(String[] args) { 
        final JFrame jf = new JFrame("Table cell selection demo (via mouse motion)"); 
        final JTable jt = new JTable(100,100); 
        jt.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); 
        jt.setRowSelectionAllowed(false); 
        jt.addMouseMotionListener(new MouseMotionAdapter() { 
            public void mouseMoved(MouseEvent e) { 
                Point p = e.getPoint(); 
                jt.changeSelection(jt.rowAtPoint(p), jt.columnAtPoint(p), false, false); 
            } 
        }); 
        jf.add(new JScrollPane(jt)); 
        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
        jf.pack(); 
        jf.setVisible(true); 
    } 
}