How to get instance of all components in a frame dynamically

Question

Hai ,
I want to know how to get the instance names and values of components on a frame . if any body knows anything on this
Please help me
Advance Thanks

Answer 1

Hai ..
Thanks for guiding me here i had copied my example code i am getting name value null
import javax.swing.*;
import java.awt.*;
import java.util.*;
* @author  naveen
public class Test extends javax.swing.JFrame {
    /** Creates new form RaviTest */
    public RaviTest() {
        initComponents();
    /** 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.
    private void initComponents() {
        jTextField1 = new javax.swing.JTextField();
        jTextField2 = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton();
        getContentPane().setLayout(null);
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
                exitForm(evt);
        getContentPane().add(jTextField1);
        jTextField1.setBounds(180, 60, 100, 20);
        getContentPane().add(jTextField2);
        jTextField2.setBounds(180, 90, 90, 20);
        jButton1.setText("jButton1");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
        getContentPane().add(jButton1);
        jButton1.setBounds(170, 140, 81, 26);
        pack();
    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        // Add your handling code here:
        Component[] comp=this.getContentPane().getComponents();
        for(int i=0;i<comp.length;i++)
            if(comp[i] instanceof JTextField)
                getT((JTextField)comp);
public void getT(JTextField jt)
System.out.print("name "+jt.getName());
System.out.println("value "+jt.getText());
/** Exit the Application */
private void exitForm(java.awt.event.WindowEvent evt) {
System.exit(0);
* @param args the command line arguments
public static void main(String args[]) {
new RaviTest().show();
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
// End of variables declaration
OUTPUT AS :
if we enter some text in text box and press the button we get like this
name null value ABCD
name null value EFGH
may be some components will have name but if they names are not set
then we get null value
what i want is at that i want the jTextField1.. as name(ie.. object name) when the name is not set how to do it