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Hello friends,

I have created three JComboBoxes. first two of them get list from string. However I select these two comboboxes, the third combobox automatically retrieve data of a particular column from my database. But in my code its only get data from first item which automatically seleted by setmodel method. Here I paste the code . Please suggest where I stucked!

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * frame1.java
 *
 * Created on Oct 25, 2012, 2:00:29 PM
 */
package smit.cse;
import java.sql.*;
/**
 *
 * @author MYPC
 */
public class frame1 extends javax.swing.JFrame {

    /** Creates new form frame1 */
    public frame1() {
        initComponents();
        String str=(String)jComboBox1.getSelectedItem();

        try{
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            Connection conn = DriverManager.getConnection("jdbc:odbc:feeds");
            Statement st=conn.createStatement();
            ResultSet rs=st.executeQuery("Select * from staffs where dept_name like'"+str+"'");
            while(rs.next()){
                String str1=rs.getString("subject");
                System.out.println(str);
                jComboBox2.addItem(str1);
            }
        }
            catch(Exception e){}


        }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        jComboBox1 = new javax.swing.JComboBox();
        jComboBox2 = new javax.swing.JComboBox();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "EEE", "ETC", "CSE" }));

        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(95, 95, 95)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jComboBox2, javax.swing.GroupLayout.PREFERRED_SIZE, 180, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(125, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(44, 44, 44)
                .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(35, 35, 35)
                .addComponent(jComboBox2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(181, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new frame1().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JComboBox jComboBox1;
    private javax.swing.JComboBox jComboBox2;
    // End of variables declaration//GEN-END:variables
}
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Last Post by mKorbel
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