JTable wont refresh in JInternalFrame

Question

hello people
my JTable wont refresh when iam using the form as an JInternalFrame, but if i use it as JFrame then the table will refresh, here is a bit of my code
public void getTable()
          Statement sat;
          ResultSet rs;
          try {
               int idx = queryType.getSelectedIndex();
               String s = columnNames[idx];
               JOptionPane.showMessageDialog(null, "yeah "+s);
               String query = "SELECT * FROM College_Master " +
                                   " WHERE  ("+s+") ='" + typelist.getSelectedItem()+"'";
               sat = connection.createStatement();
               rs = sat.executeQuery(query);
               displayResultSet(rs);
               sat.close();
          catch(SQLException sqlex) {
               sqlex.printStackTrace();
     public void displayResultSet (ResultSet rs)
               throws SQLException
               boolean moreRecords = rs.next();
               if(! moreRecords){
                    JOptionPane.showMessageDialog(this, "No record to display. Please query again.");
                    setTitle("No records to dispaly");
                    return;
               Vector columnHeads = new Vector();
               Vector rows = new Vector();
               try {
                    ResultSetMetaData rsmd = rs.getMetaData();
                    for(int i = 1;i<=rsmd.getColumnCount();i++)
                    columnHeads.addElement(rsmd.getColumnName(i));
               do {
                         ctr2++;
                         rows.addElement (getNextRow(rs, rsmd));
                         JOptionPane.showMessageDialog(null, "here"+ctr2);
                    } while (rs.next());
                    table = new JTable(rows, columnHeads);
                    JScrollPane scroller = new JScrollPane(table);
                    scroller.setBounds(10,40,660,250);
                    c.add(scroller);//c is a panel
                    validate();
               catch(SQLException sqlex) {
                    sqlex.printStackTrace();
     public Vector getNextRow (ResultSet rs, ResultSetMetaData rsmd)
                         throws SQLException
               Vector currentRow = new Vector();
               for (int i=1;i<=rsmd.getColumnCount();i++)
               switch(rsmd.getColumnType(i)) {
                    case Types.VARCHAR:
                         currentRow.addElement (rs.getString(i));
                         break;
                    case Types.INTEGER:
                         currentRow.addElement(new Long(rs.getLong(i)));
                         break;
                    default:
                         System.out.println("Type was: " + rsmd.getColumnTypeName(i));
               return currentRow;
          }whats wrong?
asrar

Answer 1

hello people
my JTable wont refresh when iam using the form as an JInternalFrame, but if i use it as JFrame then the table will refresh, here is a bit of my code
public void getTable()
          Statement sat;
          ResultSet rs;
          try {
               int idx = queryType.getSelectedIndex();
               String s = columnNames[idx];
               JOptionPane.showMessageDialog(null, "yeah "+s);
               String query = "SELECT * FROM College_Master " +
                                   " WHERE  ("+s+") ='" + typelist.getSelectedItem()+"'";
               sat = connection.createStatement();
               rs = sat.executeQuery(query);
               displayResultSet(rs);
               sat.close();
          catch(SQLException sqlex) {
               sqlex.printStackTrace();
     public void displayResultSet (ResultSet rs)
               throws SQLException
               boolean moreRecords = rs.next();
               if(! moreRecords){
                    JOptionPane.showMessageDialog(this, "No record to display. Please query again.");
                    setTitle("No records to dispaly");
                    return;
               Vector columnHeads = new Vector();
               Vector rows = new Vector();
               try {
                    ResultSetMetaData rsmd = rs.getMetaData();
                    for(int i = 1;i<=rsmd.getColumnCount();i++)
                    columnHeads.addElement(rsmd.getColumnName(i));
               do {
                         ctr2++;
                         rows.addElement (getNextRow(rs, rsmd));
                         JOptionPane.showMessageDialog(null, "here"+ctr2);
                    } while (rs.next());
                    table = new JTable(rows, columnHeads);
                    JScrollPane scroller = new JScrollPane(table);
                    scroller.setBounds(10,40,660,250);
                    c.add(scroller);//c is a panel
                    validate();
               catch(SQLException sqlex) {
                    sqlex.printStackTrace();
     public Vector getNextRow (ResultSet rs, ResultSetMetaData rsmd)
                         throws SQLException
               Vector currentRow = new Vector();
               for (int i=1;i<=rsmd.getColumnCount();i++)
               switch(rsmd.getColumnType(i)) {
                    case Types.VARCHAR:
                         currentRow.addElement (rs.getString(i));
                         break;
                    case Types.INTEGER:
                         currentRow.addElement(new Long(rs.getLong(i)));
                         break;
                    default:
                         System.out.println("Type was: " + rsmd.getColumnTypeName(i));
               return currentRow;
          }whats wrong?
asrar