JDBC manipulating data with JTable

Question

I have this code where i want to update the status of a student wher ethe cells are checked. Im just not sure what is the best way to do it. How do I go by grabbing the data from the table and updating the database? Here is the code. Certain parts are commented out for testing purposes.public void make_tableCY(){  
          /*try {
               // Create a resultset to search for course number entered in the course_num textfield
               PreparedStatement psSearchCourse= conn.prepareStatement("Select certification_date, expiration_date from registration where course_num= ?");
               //psSearchCourse.setString(1, (String) CY.jcbCoursenum.getSelectedItem());
               CY.rsSearchCourse = psSearchCourse.executeQuery();
               CY.rsSearchCourse.next();
               //CY.jtfCertDate.setText(CY.rsSearchCourse.getString(1));
               CY.rsSearchCourse.close();
               psSearchCourse.close(); 
          catch(SQLException sqlex)
               JOptionPane.showMessageDialog(null,"Please enter a valid course number");           
          try
               //  Read data from a table
               //PreparedStatement ps =conn.prepareStatement("SELECT Registration.STUDENT_ID  ,  Students.LNAME , Students.FNAME, Registration.Course_Stat_desc  FROM Registration, Students WHERE  Registration.Student_ID = Students.Student_id AND registration.course_num=?");
               PreparedStatement ps =conn.prepareStatement("SELECT * from students");
               //ps.setString(1, (String) CY.jcbCoursenum.getSelectedItem());
               ResultSet rs = ps.executeQuery();
               ResultSetMetaData md = rs.getMetaData();
               int columns = md.getColumnCount();
               //  Get column names
               for (int i = 1; i <= columns; i++)
                    CY.columnNames.addElement( md.getColumnName(i) );
               CY.columnNames.addElement("Pass");
               while (rs.next())
                    Vector row = new Vector(columns);
                    for (int i = 1; i <= columns; i++)
                         row.addElement( rs.getObject(i) );
                    row.addElement(Boolean.TRUE);
                    CY.data.addElement( row);
               rs.close();
               ps.close();
          catch(SQLException sqlex)
               JOptionPane.showMessageDialog(null,"in the certify table");
          CY.table = new JTable( CY.data, CY.columnNames){
               public Class getColumnClass(int column)
                    return getValueAt(0, column).getClass();
          CY.table.setSelectionBackground(Color.CYAN);
          /*TableColumn includeColumn = CY.table.getColumnModel().getColumn(0);
          includeColumn.setCellEditor(new DefaultCellEditor(new JCheckBox()));*/
          //adds table to scrollpane
          CY.scrollPane = new JScrollPane( CY.table );
          CY.scrollPane.setBackground(Color.CYAN);
          CY.background.add(CY.scrollPane );
          CY.scrollPane.setBounds (20, 160, 585, 155);
          //CY.jbtSearchCourse.setEnabled(false); 
          CY.jbtCertify.setEnabled(true);
     }

Answer 1

Looking for something like this
create or replace type objIncome as object(incomeType varchar2(50), income number(10,2))
create or replace type tblIncome as table of objIncome
declare
  lIncomeTbl tblIncome := tblIncome();
begin
  lIncomeTbl.extend;
  lIncomeTbl(1) := objIncome('cash','500');
  lIncomeTbl.extend;
  lIncomeTbl(2) := objIncome('Service','100');
  lIncomeTbl.extend;
  lIncomeTbl(3) := objIncome('cash','100');
  lIncomeTbl.extend;
  lIncomeTbl(4) := objIncome('penalty','50');
  lIncomeTbl.extend;
  lIncomeTbl(5) := objIncome('Service','200');
  lIncomeTbl.extend;
  lIncomeTbl(6) := objIncome('penalty','80');
  for i in (select incometype, sum(income) income
              from table(lIncomeTbl)
             group by incometype)
  loop
    dbms_output.put_line('Income Type: ' || i.incometype ||' Income: ' || i.income);
  end loop;
end;
/