Adding data to a table model at run time

Question

hiii
i want to add data to the table model at runtime.
i have used TableModel.My code looks like this
public class CaptureTableModel extends AbstractTableModel {
     private String[] columnNames = { "No", "Source", "Destination", "Protocol",
               "Flags" };
     private TCPPacket tcpPacket;
     private List data;
     private static int counter = 0;
     private int columnCount = columnNames.length;
     public CaptureTableModel(){}
     public CaptureTableModel(TCPPacket tcp) {
          try{
          tcpPacket=tcp;
          counter++;
          byte[] tcpdata = tcpPacket.getData();
          String srcHost = tcpPacket.getSourceAddress();
          String dstHost = tcpPacket.getDestinationAddress();
          String tcpPacketData = new String(tcpdata, "ISO-8859-1");
          if (tcpPacketData == null)
               tcpPacketData = "";
          int protocol = tcpPacket.getProtocol();
          String proto = null;
          if (protocol == 6)
               proto = "TCP";
          long sequenceNumber = tcpPacket.getSequenceNumber();
          data = new ArrayList();
          String[] info = {
                    Integer.toString(counter),
                    srcHost,
                    dstHost,
                    proto,
                    "[ACK " + tcpPacket.isAck() + " ; FIN " + tcpPacket.isFin()
                              + " ; PUSH " + tcpPacket.isPsh() + " ; RESET "
                              + tcpPacket.isRst() + " ; SYN " + tcpPacket.isSyn()
                              + " ; URGENT " + tcpPacket.isUrg() };
          data.add(info);
     } catch (Exception e) {
          e.printStackTrace();//return null;
     public int getRowCount() {
          return counter;
     public int getColumnCount() {
          return columnCount;
     public String getColumnName(int column) {
          return columnNames[column];
     public Object getValueAt(int rowIndex, int columnIndex) {
          System.out.println("the value in getValueAt"+((Object[])data.get(rowIndex))[columnIndex]);
          return ((Object[])data.get(columnIndex))[rowIndex];
          //return null;
the method getValueAt is not bieng called..where am i going wrong.
can anyone help me??

Answer 1

Use the "code" formatting tags when posting code so the code retains its original formatting.
i want to add data to the table model at runtime.Use the DefaultTableModel it supports dynamic methods like addRow(...), removeRow().