String toolTipText;
if (component instanceof JTable)
{
JTable table = (JTable)component;
int row = table.rowAtPoint(event.getPoint());
int column = table.columnAtPoint(event.getPoint());
if (row != -1 && column != -1)
{
TableCellRenderer renderer = table.getCellRenderer(row, column);
Component comp = renderer.getTableCellRendererComponent(table,
table.getValueAt(row, column), true, true, row, column);