CheckBox

Soy nuevo en Java, estoy usando (Netbeans 7.1.2), necesito terminar este proyecto, pero no hacer que se ejecute el programa.
La conectividad al SQL SERVER, se establece sin problema.
Lo que no puedo es visualizar en el checkbox, los datos que solicito

LES DEJO EL CODIGO QUE ESTOY USANDO:

package testcon;
import java.sql.*;
//import javax.swing.JOptionPane;
import java.lang.*;
import java.awt.Button;
import javax.swing.JComboBox;
/**
*
* @author egarcia
*/
public class usuarwht extends javax.swing.JFrame {

private static class CallableStatment {

public CallableStatment() {
}
}
Connection con;
ResultSet r;
CallableStatment cst;

public usuarwht() {
initComponents();

}

@SuppressWarnings("unchecked")
//
private void initComponents() {

jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jTextField1 = new javax.swing.JTextField();
jLabel1 = new javax.swing.JLabel();
jComboBox1 = new javax.swing.JComboBox();

jButton1.setText("jButton1");

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

jButton2.setText("Hint");

jLabel1.setText("E:");

jComboBox1.setEditable(true);
jComboBox1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jComboBox1ActionPerformed(evt);
}
});

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(72, 72, 72)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, 122, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap())
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createSequentialGroup()
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 122, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 115, Short.MAX_VALUE)
.addComponent(jButton2)))
.addGap(40, 40, 40))))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(41, 41, 41)
.addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton2)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(53, 53, 53)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 93, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(52, Short.MAX_VALUE))
);

pack();
}//

private void jComboBox1ActionPerformed(java.awt.event.ActionEvent evt) {
this.setLocationRelativeTo(null);
try{
Class.forName("jdbc.odbc.JdbcOdbcDriver");
con =DriverManager.getConnection("jdbc:sqlserver://S08X64110SQL8\\MSSQLSERVER:1433;databaseName=WhatsUp [sa on dbo]");

/* jComboBox1 = new JComboBox();
Statement s = con.createStatement();
String query = " select * from WebUser ";
r = s.executeQuery(query);
jComboBox1.removeAllItems();
while(r.next())

jComboBox1.addItem(r.getString(query));
jComboBox1.addItem(r.getObject(1));*/

}catch(ClassNotFoundException | SQLException e){}
}

public static void main(String args[]) {

java.awt.EventQueue.invokeLater(new Runnable() {

public void run() {
new usuarwht().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JComboBox jComboBox1;
private javax.swing.JLabel jLabel1;
private javax.swing.JTextField jTextField1;
// End of variables declaration
}