Why i can't compare two string

Question

* @(#)Assignment.java 1.0 03/12/12
* You can modify the template of this file in the
* directory ..\JCreator\Templates\Template_1\Project_Name.java
* You can also create your own project template by making a new
* folder in the directory ..\JCreator\Template\. Use the other
* templates as examples.
//package myprojects.assignment;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import java.text.*;
* MainForm.java
* Created on 12 December 2003, 16:27
* @author Akasha
public class Assignment extends javax.swing.JFrame {
     private String myname;
private String utxtname,ptxtpass;
/** Creates new form MainForm */
public Assignment() {
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() {
     //     JText = new JFormattedTextField();
     jButton1 = new javax.swing.JButton();
jTextField1 = new javax.swing.JTextField();
jTextField2 = new javax.swing.JTextField();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
getContentPane().setLayout(null);
          getContentPane().setBounds(800,800,800,800);
addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
formMouseClicked(evt);
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent evt) {
exitForm(evt);
jButton1.setBackground(new java.awt.Color(0, 0, 255));
jButton1.setForeground(new java.awt.Color(204, 255, 255));
jButton1.setText("Login");
jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jButton1MouseClicked(evt);
getContentPane().add(jButton1);
jButton1.setBounds(110, 160, 70, 30);
getContentPane().add(jTextField1);
jTextField1.setBounds(220, 70, 150, 20);
getContentPane().add(jTextField2);
jTextField2.setBounds(220, 100, 150, 20);
     //     getContentPane().add(JFormattedTextField1);
          //JFormattedTextField.
jLabel1.setText("User Name");
getContentPane().add(jLabel1);
jLabel1.setBounds(60, 70, 150, 16);
jLabel2.setText("Password");
getContentPane().add(jLabel2);
jLabel2.setBounds(60, 100, 160, 16);
pack();
private void formMouseClicked(java.awt.event.MouseEvent evt) {
// Add your handling code here:
private void jButton1MouseClicked(java.awt.event.MouseEvent evt) {
     myname="mazhar";
     utxtname = jTextField1.getText();
     if (myname == utxtname)
               JOptionPane.showMessageDialog(null,"This is"+ utxtname + myname+ " first ","Welcome",JOptionPane.INFORMATION_MESSAGE);
          else if (myname != utxtname)
               JOptionPane.showMessageDialog(null,"This is"+ myname+ "first action","Welcome",JOptionPane.INFORMATION_MESSAGE);
// Add your handling code here
/** 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[]) {
     Assignment assign =new Assignment();
     //width and hight
     assign.setSize(400, 175);
assign.show();
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
// End of variables declaration

Answer 1

Basic java. I think that you need to read the tutorial... ;-) http://java.sun.com/docs/books/tutorial/
BAD (yours): you are comparing objects (ref to objects -> always differents even if there contains the same thing)
==========
if (myname == utxtname) {
JOptionPane.showMessageDialog(null,"This is"+ utxtname + myname+ " first ","Welcome",JOptionPane.INFORMATION_MESSAGE);
} else if (myname != utxtname) {
JOptionPane.showMessageDialog(null,"This is"+ myname+ "first action","Welcome",JOptionPane.INFORMATION_MESSAGE);
GOOD (mine):
===========
if (myname.equals(utxtname)) {
JOptionPane.showMessageDialog(null,"This is"+ utxtname + myname+ " first ","Welcome",JOptionPane.INFORMATION_MESSAGE);
} else {
//if (!myname.equals(utxtname)) {
JOptionPane.showMessageDialog(null,"This is"+ myname+ "first action","Welcome",JOptionPane.INFORMATION_MESSAGE);