Problem in JComboBox selected Index change

Question

hi all
Can anyone send me the code for Loading values to JComboBox & then i want to Display Particular value for that Loaded value in JTextField.
Ex:
I loaded category cade for JComboBox & when JComboBox selected index change the particular category name should appear in JTextBox
Thankz

Answer 1

Hi,
I am sending a sample program.
Try this, if u had any problem just mail me at [email protected]
import javax.swing.*;
import java.util.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
public class SwingDemo extends JFrame implements ItemListener
     JComboBox combo;
     JTextField text;
     Properties props;
     public SwingDemo() throws Exception
          super();
          combo=new JComboBox();
          text=new JTextField();
          addItems("combodata.dat");
          setLayout(new GridLayout(2,1));
          add(combo);
          add(text);
          combo.addItemListener(this);
          setTitle("JComboBox - Demo");
          setSize(400,400);
          setVisible(true);
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          pack();
     public static void main(String[] args) throws Exception
          new SwingDemo();
     public void addItems(String str) throws Exception
          FileInputStream fis=new FileInputStream(str);
          props=new Properties();
          props.load(fis);
          Enumeration e=props.propertyNames();
          while(e.hasMoreElements())
               combo.addItem((String)e.nextElement());
     public void itemStateChanged(ItemEvent ie)
          //System.out.println(ie.getSource());
          //System.out.println((ie.getSource()==combo));
          if(ie.getSource()==combo)
               System.out.println(combo.getSelectedItem());
               System.out.println(props.getProperty(combo.getSelectedItem().toString()));
               text.setText(props.getProperty(combo.getSelectedItem().toString()));
               pack();
For the above program I took data from a file instead of the database
You have to create that file to execute the above program with the name combodata.dat and the values as follwos
1=BSc
2=BCA
3=BA/BCom
4=MSc(IS)
5=MSc(Cs)
6=MCA
7=BE/BTech
8=MBA
Bye...
Thanks & Regards,
Santhosh Reddy Mandadi