How to get data from database to JComboBox

Question

hi
i am trying to get data which is in database. here the problem is i am getting only one row in the JcomboBox
i want all data just like list. i dont know how to get that . below is the code plz any one help me....
import javax.swing.*;
import javax.swing.JList.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.String.*;
import java.lang.Integer.*;
import java.sql.*;
public class customer_code extends JFrame implements ActionListener
Container c=getContentPane();
JLabel customer_code=new JLabel("Customer Code and Name");
customer_code()
super("Customer Details");
setSize(300,250);
setVisible(true);
setLayout(null);
setLocation(430,310);
Font f=new Font("SansSerif",1,16);
Font f1=new Font("SansSerif",0,14);
customer_code.setBounds(10,20,250,30);
add(customer_code);
customer_code.setFont(f);
ResultSet rs=null;
String j=null,k=null;
try
System.out.println("MySQL Connect Example.");
Statement st=null;
Connection con=null;
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = DriverManager.getConnection("jdbc:odbc:project","vikky","vishu");
System.out.println("Connected to the database");
st=con.createStatement();
rs=st.executeQuery(" select code as c,Customer_name as n from customer_details ");
while(rs.next())
j=rs.getString("c");
k=rs.getString("n");
System.out.println(j);
System.out.println(k);
String[] names = new String[] {j,k};
JComboBox comboBox = new JComboBox(names);
add(comboBox);
comboBox.setBounds(25,60,250,50);
comboBox.setFont(f);
comboBox.addActionListener(this);
comboBox.setMaximumRowCount(10);
con.close();
System.out.println("Disconnected from database");
catch (Exception e)
e.printStackTrace();
public void actionPerformed(ActionEvent event)
if ("comboBoxChanged".equals(event.getActionCommand()))
System.out.println("User has selected an item from the combo box.");
JComboBox comboBox = (JComboBox) event.getSource();
if(comboBox.getSelectedItem().equals("None"))
public static void main(String agr[])
customer_code cd=new customer_code();
}

Answer 1

r035198x wrote:
Also separate that database code from interface display code.
You should never access the database on the EDT.
See [Doing Swing Right|http://bytes.com/topic/java/insights/853297-doing-swing-right] for more details.
Yes! By the time you are working with Swing and JDBC you should already know how to structure code. If not, then you are not ready for these topics and you've jumped the gun.