Problem in Saving records in JTable

Question

Hi all,
iam using DefaultTableModel ... iam displaying Rows and Columns in my table from database..and iam adding a new row to edit data and by clicking the save button the edited data as to be stored in the database..
My task is to Add the edited data in from the JTable to the database..
My Save Method.............
The problem iam facing in these methiod is that
When ian typing data in the newly added row three columns it is showing nullpointer exception and if i type
some data in the fourth column it is printing without exception but see below i am getting table value only for three columns .............
public void save(){
     int row =info_table.getSelectedRow();
     System.out.println(row);
     strCustId = info_table.getValueAt(row, 0).toString();
     System.out.println(strCustId);
     strDelFlg =info_table.getValueAt(row, 1).toString();
     System.out.println(strDelFlg);
                     strPostCd =info_table.getValueAt(row, 2).toString();
                      System.out.println(strPostCd);
          

Answer 1

this question has come up VERY often in this forum, as well as the database forum, AND the java programming forum, just doing a quick search i've come up with these threads:
http://forum.java.sun.com/thread.jsp?forum=57&thread=557433
http://onesearch.sun.com/search/onesearch/index.jsp?qt=jtable+to+database&rf=0&qp=siteforumid%3Ajava48&site=dev&nh=10&cs=0&chooseCat=allJava&st=1&col=developer-forums