Couldn't show sql data in jtable, please help

Question

Dear All,
I'm trying to display the data from database in a jtable by following the jtable demo example in Java Tutorials Sample Code; but, I couldn't output the data to the jtable. The following code is what I've done so far. Can anybody please point out a direction for showing the data in jtable? Thanks a lot in advance.
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
public class Patient {
static String szJdbcURL = "jdbc:oracle:thin:@129.78.110.188:1521:MyDB";                
static String szUser = "...";                
static String szPasswd = "...";                
static String szModelName = "...";
static Oracle oracle = new Oracle(szJdbcURL, szUser, szPasswd);
public void findMedication() throws SQLException{
  Statement stmt1 = null;
  try {
         stmt1=oracle.getConnection().createStatement();             
          String res1=null;
          String res2=null;                
     String sqlQuery="Select * From PatientTable ";
        ResultSet rs= stmt1.executeQuery(sqlQuery);
   if (!rs.isBeforeFirst())
         {System.out.println("OOPS! data not found.");
          System.out.println(); }
   else {
    while (rs.next()) {
   ArrayList<Medication> medList = new ArrayList<Medication>();
   res1=rs.getString("patientName");
   res2=rs.getString("medication");
   Medication med=new Medication (res1, res2);
   medList.add(med);
   System.out.println();
   finally {stmt1.close();}
import java.util.ArrayList;
public class Medication {
    String ptName;
    String ptMedication;
public Medication(String ptName, String ptMedication){
  this.ptName=ptName;
  this.ptMedication=ptMedication;
public String getPtName() {
  return ptName;
public void setPtName(String ptName) {
  this.ptName = ptName;
public String getPtMedication() {
  return ptMedication;
public void setPtMedication(String ptMedication) {
  this.ptMedication = ptMedication;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.util.ArrayList;
public class TableDemo extends JPanel {
  private boolean DEBUG = false;
public TableDemo () {
  super(new GridLayout(1,0));
  ArrayList<Medication> medList = new ArrayList<Medication>();
  //how to add the data to the ArrayList here?
        JTable table = new JTable(new MyTableModel(medList));
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));
        table.setFillsViewportHeight(true);
        //Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);
        //Add the scroll pane to this panel.
        add(scrollPane);
  class MyTableModel extends AbstractTableModel {
     private String[] columnNames = new String []{"Patient Name", "Medication"};
     ArrayList<Medication> medList = null;
    public MyTableModel (ArrayList<Medication> medList){
     this.medList=medList;
       public int getColumnCount() {  
     return columnNames.length;
   public int getRowCount() {
    return medList.size();
   public String getColumnName(int columnIndex) {
        return columnNames[columnIndex];
public Object getValueAt(int rowIndex, int columnIndex) {
  Medication object = medList.get(rowIndex);
        switch (columnIndex) {
        case 0:
             return object.getPtName();
        case 1:
             return object.getPtMedication();   
        default:
             return "unknown";
@SuppressWarnings("unchecked")
public Class getColumnClass(int c) {
        return getValueAt(0, c).getClass();
     private static void createAndShowGUI() {
         JFrame frame = new JFrame("TableDemo");
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         //Create and set up the content pane.
         TableDemo newContentPane = new TableDemo();
         newContentPane.setOpaque(true); //content panes must be opaque
         frame.setContentPane(newContentPane);
         //Display the window.
         frame.pack();
         frame.setVisible(true);
     public static void main(String[] args) {
         javax.swing.SwingUtilities.invokeLater(new Runnable() {
             public void run() {
                 createAndShowGUI();

Answer 1

This line will create an ArrayList which will be used to store the output data of the sql query with the type is Medication class
NO! Read what TPD ask again carefully -
Please explain (as explicit as you can) what these two lines do.
Did you notice that TWO in there?
Did you notice that your reply said 'This line' when it should have said 'These TWO lines .'?
You are creating a new ArrayList EVERY TIME thru the loop; you are NOT creating ONE ArrayList and adding things to it.
The problem is how to show the ArrayList in the jtable defined in another class.
And the answer is: use one of the THOUSANDS of examples on the internet.
See the trail 'How to Use Tables' in The Java Tutorials
http://docs.oracle.com/javase/tutorial/uiswing/components/table.html
Read the trail - try the example. You learn by doing and using code that already works.