Hi, Here is my code:

import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import javax.swing.*;

public class civil_fst extends JFrame implements ItemListener, ActionListener{

    static Connection con;
    static Statement stmt;
    static ResultSet rs;
    static ResultSetMetaData rsMeta;

    String query;
    String ref="",rollno="";
    String[] heads;
    int[] stChange;
    String[][] cubeData;
    int rows, cols, coo;

    /** Creates new form civil_fst */
    public civil_fst() {
        initComponents();

        con  = null;
        stmt = null;
        rs = null;
        rsMeta=null;

        query="SELECT *  FROM  civilfattnd order by Regd_No";
        rows=0;
        cols=0;
        coo=0;

        try
            {
                Class.forName("com.mysql.jdbc.Driver");
                con=DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","root");
                con.setAutoCommit(true);
                stmt=con.createStatement();

                rs=stmt.executeQuery(query); //execute the query and get resultset(rs)
                rsMeta=rs.getMetaData(); //get rs metadata
                cols=rsMeta.getColumnCount(); // get number of columns
                coo=cols-1;

                while(rs.next()) {              // get rows in resultset
                  ++rows;
               }
                heads = new String[cols];           // initialize col heads

                for (int i = 0; i < cols; i++) {        // getting colums  heading in heads[]
                    int colindex=i+1;               // column indexes start from 1
                    heads[i] = rsMeta.getColumnName(colindex);
                }
                stChange = new int[rows];           //to save value when status changed


                rs=stmt.executeQuery(query);        // execure query and get resultset (rs)
                cubeData = new String[rows][cols];          // initialize table data

                int j=0; int k=0;               // function to get resultset data
                while(rs.next())
                {
                    if(j<=rows)
                    {
                        int h=1;
                        if(k<=cols)
                        {
                            for(int cc=0;cc<cols; cc++)
                            {
                                cubeData[j][k]=rs.getString(h);
                                h++;
                                k++;
                            }
                        }
                        k=0;h=0;
                        j++;
                    }
                }
        }
        catch(Exception ex)
         { System.err.println(ex.getMessage());
           ex.printStackTrace(System.err);
         }

        cp.setLayout(new GridLayout(rows+2,cols)); // 1 additional Row of Col heading, 1 for save btn


        //---------------- Adding heading in CP---------------------------------------

    for (int i = 0; i < cols; i++) {
        JLabel jl = new JLabel(" [ "+heads[i]+" ] ");
        jl.setOpaque(true);
        jl.setBackground(Color.gray);
        jl.setForeground(Color.white);
        cp.add(jl);

    }

    //---------------- Adding data ---------------------------------------


    for(int j=0; j<rows; j++){
        for(int k=0; k<cols; k++)
            {
             if(k==(cols-1))
                {    ref="-"+j+"."+k;
                    String status=cubeData[j][k]+ref;
                    stChange[j]=Integer.parseInt(rollno); // save previously selected status of each                                               // row(student) + array address
                    Choice jc = new Choice();

                        jc.add("Present"+ref);
                        jc.add("Leave"+ref);
                        jc.add("Absent"+ref);


                        jc.select(status);

                            jc.addItemListener(this);
                        cp.add(jc);

                }
             else
              cp.add(new JLabel(cubeData[j][k]));
              rollno=cubeData[j][k];
            }
        }
    addSaveButton();
    }
//------------------------SAVE BUTTON-----------------------------------------

    public void addSaveButton(){
        JButton saveBtn = new JButton(" ::::  Save  :::: ");
        saveBtn.addActionListener(this);
        cp.add(saveBtn);
    }




    //------------------------Item Listener -----------------------------------------
  public void itemStateChanged(ItemEvent ie) {
    String s = (String)ie.getItem();

    String ro = s.substring(s.indexOf("-")+1,s.indexOf("."));
    String co = s.substring(s.indexOf(".")+1,s.length());

    String stats = s.substring(0,s.indexOf("-"));

    int roo = Integer.parseInt(ro);
    coo = Integer.parseInt(co);

    cubeData[roo][coo]=stats;
  }

    //------------------------Action Listener-----------------------------------------
  public void actionPerformed(ActionEvent ae) {

    try{
        String create="CREATE TABLE civ_fourth (`Name` VARCHAR(50), `Regd_No` INT, `Status` VARCHAR(20) NOT NULL)";
                con=DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","root");
                stmt.executeUpdate(create);
                //con.close();
            }
            catch(Exception ex)
             { System.err.println(ex.getMessage());
             ex.printStackTrace(System.err);
             }

             try{
                for(int j=0; j<rows; j++)
        {
            //String updt = "update civilfattnd set Status= '"+cubeData[j][coo]+"' where Regd_No="+stChange[j];
                        String ins="INSERT INTO civ_fourth (`Regd_No`, `Status`) VALUES('"+stChange[j]+","+cubeData[j][coo]+")";

            con=DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","root");

            //stmt.executeUpdate(updt);
                        PreparedStatement ps=con.prepareStatement(ins);
        }
            //this.con.commit();
                        con.setAutoCommit(true);
            System.out.println("Records updated..!");
            con.close();

    }catch(Exception ex)
     { System.err.println(ex.getMessage());
       ex.printStackTrace(System.err);
     }
  }
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        cp = new javax.swing.JPanel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("...:::Civil First Sem:::...");
        setBounds(new java.awt.Rectangle(250, 250, 0, 0));
        setLocationByPlatform(true);

        cp.setBackground(new java.awt.Color(154, 95, 125));

        javax.swing.GroupLayout cpLayout = new javax.swing.GroupLayout(cp);
        cp.setLayout(cpLayout);
        cpLayout.setHorizontalGroup(
            cpLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 539, Short.MAX_VALUE)
        );
        cpLayout.setVerticalGroup(
            cpLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 308, Short.MAX_VALUE)
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(cp, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(cp, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );

        pack();
    }// </editor-fold>                        

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new civil_fst().setVisible(true);
            }
        });
    }

But this code create a new table but problem is its not execute the query for insert. I tried a lot but not successes . Please help me