Thread: Having Problem with my JComboBox

Sorry for not highlighting my code and Thank you sir for the fast respond i already change it but my JComboBox doesn't show anything only a blank Jcombobox sir

DbFunction Class

import java.util.*;
import java.sql.*;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
 
public class DbFunctions {
 
    private static Connection dbConn;
    private static Statement st;
    private static String dbURL = "jdbc:odbc:studODBC";
    private static String dbUsername = "root";
    private static String dbPassword = "";
 
    public DbFunctions() {
        DbFunctions.connectDB();
    }
 
    public static boolean connectDB() {
        try {
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            dbConn = DriverManager.getConnection(dbURL, dbUsername, dbPassword);
            st = dbConn.createStatement();
            return true;
 
        } catch (Exception ex) {
            ex.printStackTrace();
            return false;
        }
    }
     public List getCurriculum() {
        ResultSet rsRec;
        List curriculum = new ArrayList();
        String sql;
        sql = "select * from tblcuri order by fldDescp";
        try {
            rsRec = st.executeQuery(sql);
            while (rsRec.next()) {
              /*  List row = new ArrayList();
                row.add(rsRec.getString("fldCurId"));
               row.add(rsRec.getString("fldSy"));
               row.add(rsRec.getString("fldDescp"));
                */
               curriculum.add(rsRec.getString("fldDescp"));
            }
            rsRec.close();
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
        return curriculum;
 
    }

Student (Jframe) class

import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import javax.swing.table.DefaultTableModel;
import java.util.*;
import java.util.List;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.*;
 
public class student extends javax.swing.JFrame {
 
    /** Creates new form student */
    public student() {
        initComponents();
        List cList = dbFunctions.getCurriculum();
 
 
      cbCurr = new JComboBox();
 
        Iterator<String> iterator = cList.iterator();
        while (iterator.hasNext()) {
 
            String string  = iterator.next();
 
         cbCurr.addItem(iterator.next());
 
        }
    }
 public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
 
            public void run() {
                new student().setVisible(true);
 
            }
        });
    }
}

There are missing portions of your code. It helps both you and us to boil the problem down to a short, concise, and compilable example that can demonstrate the problem. I'd suggest first playing with the JComboBox, adding 'dummy' values to verify it is working in the context you have. Then expand that to incorporate you database values. When in doubt, add some System.out.println statements to make sure the values are what you expect. In other words, one of the keys to debugging is to break the problem down into individual components, get them to work, then expand them into each other