m_InstanceQuery.setDebug(dbd.getDebug());
  protected void setInstancesFromDBaseQuery() {    try {      if (m_InstanceQuery == null) {	m_InstanceQuery = new InstanceQuery();      }      String dbaseURL = m_InstanceQuery.getDatabaseURL();      String username = m_InstanceQuery.getUsername();      String passwd = m_InstanceQuery.getPassword();      /*dbaseURL = (String) JOptionPane.showInputDialog(this,					     "Enter the database URL",					     "Query Database",					     JOptionPane.PLAIN_MESSAGE,					     null,					     null,					     dbaseURL);*/                       DatabaseConnectionDialog dbd= new DatabaseConnectionDialog(null,dbaseURL,username);      dbd.setVisible(true);            //if (dbaseURL == null) {      if (dbd.getReturnValue()==JOptionPane.CLOSED_OPTION) {	m_FromLab.setText("Cancelled");	return;      }      dbaseURL=dbd.getURL();      username=dbd.getUsername();      passwd=dbd.getPassword();      m_InstanceQuery.setDatabaseURL(dbaseURL);            m_InstanceQuery.setUsername(username);      m_InstanceQuery.setPassword(passwd);            m_InstanceQuery.connectToDatabase();      if (!m_InstanceQuery.experimentIndexExists()) {	System.err.println("not found");	m_FromLab.setText("No experiment index");	return;      }      System.err.println("found");      m_FromLab.setText("Getting experiment index");      Instances index = m_InstanceQuery.retrieveInstances("SELECT * FROM "				       + InstanceQuery.EXP_INDEX_TABLE);      if (index.numInstances() == 0) {	m_FromLab.setText("No experiments available");	return;	      }      m_FromLab.setText("Got experiment index");      DefaultListModel lm = new DefaultListModel();      for (int i = 0; i < index.numInstances(); i++) {	lm.addElement(index.instance(i).toString());      }      JList jl = new JList(lm);      jl.setSelectedIndex(0);      int result;      // display dialog only if there's not just one result!      if (jl.getModel().getSize() != 1) {        ListSelectorDialog jd = new ListSelectorDialog(null, jl);        result = jd.showDialog();      }      else {        result = ListSelectorDialog.APPROVE_OPTION;      }      if (result != ListSelectorDialog.APPROVE_OPTION) {	m_FromLab.setText("Cancelled");	return;      }      Instance selInst = index.instance(jl.getSelectedIndex());      Attribute tableAttr = index.attribute(InstanceQuery.EXP_RESULT_COL);      String table = InstanceQuery.EXP_RESULT_PREFIX	+ selInst.toString(tableAttr);      setInstancesFromDatabaseTable(table);          } catch (Exception ex) {       // 1. print complete stacktrace       ex.printStackTrace();       // 2. print message in panel       m_FromLab.setText("Problem reading database: '" + ex.getMessage() + "'");    }  }