updating database table from jtable in netbeans

[PreethiGowri]

how do we update the back-end table from front-end jtable?
i'm using the following things in my project -
editor- netbeans 7.2
framework - core java
database - mysql 5.0.96

my question-
i have a jtable with just one column made editable, when the user edit's the content of the table from front-end i want to update my table in back-end with the edited value, and how do i do it?

[PreethiGowri]

I solved the problem, below is the code :

 
for (int i = 0; i < jTable1.getRowCount(); i++) 
{
System.out.println(" jtable row " + i);
String qty = jTable1.getValueAt(i, 3).toString();
String query4 = "update " + cartnumber.getText() + " set quantity = " + qty + " where rfid_no = 
"+jTable1.getValueAt(i, 0) + " 
and name = '" + jTable1.getValueAt(i, 1) + "'";
st4.executeUpdate(query4);