JTable & JDBC

Question

Hello all!
I need your help! I have soon a deadline in Java Programming and I have to get the data from the MySQL Database into the jtable. The data has to be editable, so I need a TableModel, which extends AbstractTableModel. There is a perfect example of such a table in the sun tutorial, but the table is initialized in the programm (not from the database)...I can successful connect to the DB, but can not get data...Please help! Here is a programm from SunTutorial and what I do...
public class Students extends JPanel {
private boolean DEBUG = false;
public Studenten() {
super(new GridLayout(1,0));
JTable table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);
JScrollPane scrollPane = new JScrollPane(table);
add(scrollPane);
class MyTableModel extends AbstractTableModel {
private String[] columnNames = {"First Name",
"First Name",
"Last Name",
"StNumber"};
*private Object[][] data = {*
*{"Mary", "Brown",*
*"123456"},*
*{"Alison", "Huml",*
*"543212"},*
public int getColumnCount() {
return columnNames.length;
public int getRowCount() {
return data.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
return data[row][col];
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
public boolean isCellEditable(int row, int col) {
if (col < 2) {
return false;
} else {
return true;
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
data[row][col] = value;
fireTableCellUpdated(row, col);
if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
System.out.println();
System.out.println("--------------------------");
And that is, what I have...
String url = "jdbc:mysql://localhost/bibliothek";
String user = "root";
String pass = "root";
Connection conn = null;
try {
conn = DriverManager.getConnection(url, user, pass);
Statement stmt = conn.createStatement();
String sqlCommand ="SELECT stnumber, name, fname FROM student";
ResultSet rs = stmt.executeQuery(sqlCommand);
while (rs.next()) {
String name = rs.getString(1);
String vorname = rs.getString(2);
String stnummer = rs.getString(3);
System.out.println(name+" "fname" "+stnumber);
*Object[][] data = {{name, fname, stnumber}};*
String[] tblHead = {"Name", "FirstName", "StudentNumber"};
JTable jTable1 = new JTable(data, tblHead);
getContentPane().add(jTable1);
stmt.close();
conn.close();
catch (SQLException sqle) {
System.out.println("SQLException: " + sqle.getMessage());
System.out.println("SQLState: " + sqle.getSQLState());
System.out.println("VendorError: " + sqle.getErrorCode());
sqle.printStackTrace();
It dosn't work... What have I to write into Object [][] data in order to read from the database?? And in what moment have I to connect to database?? I'm waiting for your replies!!!

Answer 1

Cross posted all over the place
[http://forum.java.sun.com/thread.jspa?threadID=5310504]