program code about log in information using java JFrame

Any beginner's java book has examples on how to create gui using javax.swing.If you don't have already such a book search the internet for tutorials. And check the java API for the following classes:
JFrame, JPanel, JTextField, JPasswordField, JButton, JLabel
And the interface ActionListener

Sample Code for Login Using JFrame with MySql Server Database as Back End
Further Discussion IM ahilansoftware@gmail.com,ahilan_23@yahoo.co.in

import java.awt.*;
import java.awt.event.*;
import java.io.FileOutputStream;
import java.net.URL;
import java.net.URLConnection;
import javax.swing.*;
import java.sql.*;
import java.io.*;

/**
 * Summary description for UserVallidation
 *
 */
public class UserVallidation extends JFrame {
    // Variables declaration
    private JLabel jLabel1;
    private JLabel jLabel2;
    private JTextField jTextField1;
    private JPasswordField jPasswordField1;
    private JButton jButton1;
    private JButton jButton2;
    private JPanel contentPane;


    Boolean loop = false;
    // End of variables declaration


    public UserVallidation() {
        super();
        initializeComponent();
        //
        // TODO: Add any constructor code after initializeComponent call
        //
        this.setVisible(true);
    }

    /**
     * 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 Windows Form Designer. Otherwise, retrieving design might not work properly.
     * Tip: If you must revise this method, please backup this GUI file for JFrameBuilder
     * to retrieve your design properly in future, before revising this method.
     */
    private void initializeComponent() {
        jLabel1 = new JLabel();
        jLabel2 = new JLabel();
        jTextField1 = new JTextField();
        jPasswordField1 = new JPasswordField();
        jButton1 = new JButton();
        jButton2 = new JButton();
        contentPane = (JPanel)this.getContentPane();

        //
        // jLabel1
        //
        jLabel1.setText("EK UserName");
        //
        // jLabel2
        //
        jLabel2.setText("EK Password");
        //
        // jTextField1
        jTextField1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                jTextField1_actionPerformed(e);
            }

        });
        //
        // jPasswordField1
        //
        jPasswordField1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                jPasswordField1_actionPerformed(e);
            }

        });
        //
        // jButton1
        //
        jButton1.setText("OK");
        jButton1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                jButton1_actionPerformed(e);
            }

        });
        //
        // jButton2
        //
        jButton2.setText("Cancel");
        jButton2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                jButton2_actionPerformed(e);
            }

        });
        //check boxes


        //
        // contentPane
        //
        contentPane.setLayout(null);
        addComponent(contentPane, jLabel1, 10,20,91,18);
        addComponent(contentPane, jLabel2, 10,70,77,18);
        addComponent(contentPane, jTextField1, 100,20,100,22);
        addComponent(contentPane, jPasswordField1, 100,70,100,22);
        addComponent(contentPane, jButton1, 50,100,83,28);
        addComponent(contentPane, jButton2, 170,100,83,28);

        // UserVallidation
        //
        this.setTitle("EK User Verification");
        this.setLocation(new Point(390, 300));
        this.setSize(new Dimension(290, 200));
        jPasswordField1.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyPressed(java.awt.event.KeyEvent evt) {
                jPasswordField1KeyPressed(evt);
            }
          /*  public void keyTyped(java.awt.event.KeyEvent evt) {
                txt_useremailKeyTyped(evt);
            }*/
        });
    }

    /** Add Component Without a Layout Manager (Absolute Positioning) */
    private void addComponent(Container container,Component c,int x,int y,int width,int height) {
        c.setBounds(x,y,width,height);
        container.add(c);
    }



    //
    // TODO: Add any appropriate code in the following Event Handling Methods
    //
    private void jTextField1_actionPerformed(ActionEvent e) {
        System.out.println("\njTextField1_actionPerformed(ActionEvent e) called.");
        // TODO: Add any handling code here

    }

    private void jPasswordField1_actionPerformed(ActionEvent e) {
        System.out.println("\njPasswordField1_actionPerformed(ActionEvent e) called.");
        // TODO: Add any handling code here

    }

    private void jButton1_actionPerformed(ActionEvent e) {

        login();
        System.out.println("\njButton1_actionPerformed(ActionEvent e) called.");
    }
    //action  listener
    private void jPasswordField1KeyPressed(java.awt.event.KeyEvent evt) {
        // TODO add your handling code here:
        if(evt.getKeyCode() == 10) {
            login();
        }
    }


    public  void  login() {
        String username=null;
        String password=null;
        String dburl=null;
        String   dburl1=null;
        String  dburl2=null;
        DataInputStream    dis=null;
        username = new String(jTextField1.getText());
        password = new String(jPasswordField1.getPassword());
         if((username.equals(""))&&(password.equals(""))) {
            JOptionPane.showMessageDialog(this,"Enter the UserName and Password","User Verification",1);
            new UserVallidation();
        } else if((username.equals(""))) {
            JOptionPane.showMessageDialog(this,"Enter the UserName ","User Verification",1);
            new UserVallidation();
        } else if((password.equals(""))) {
            JOptionPane.showMessageDialog(this,"Enter the Password ","User Verification",1);
            new UserVallidation();
        } else {
            try {
                dburl = "jdbc:mysql://127.0.0.1:3306/"
                dburl1 = "root";
                dburl2="admin";
                Class.forName("com.mysql.jdbc.Driver");
                Connection con=DriverManager.getConnection(dburl,dburl1,dburl2);
                Statement stat=con.createStatement();
                System.out.println("connection opened");
                PreparedStatement pstmt1=null;
                ResultSet rs=null;
                do{
                    loop = false;
                    username = new String(jTextField1.getText());
                    password = new String(jPasswordField1.getPassword());
                    pstmt1=con.prepareStatement("select username,password  from  TBLEK_REGISTRATION  where username=? and password=?");
                    pstmt1.setString(1,username);
                    pstmt1.setString(2,password);
                    rs=pstmt1.executeQuery();
                    if(!rs.next() && rs.getRow() == 0) {
                        JOptionPane.showMessageDialog(this,"Login Failed. Please try again!");
                        jTextField1.setText("");
                        jPasswordField1.setText("");
                        loop = true;
                        new UserVallidation();
                        break;
                    }else {

                        username = rs.getString("username");
                        password=rs.getString("password");
                        this.setVisible(false);

                     }
                }while (loop);

            }catch(Exception Ex) {

                System.out.println("Exception arises"+Ex);
            }

        }
        this.setEnabled(false);
        this.setVisible(false);
    }
    private void jButton2_actionPerformed(ActionEvent e) {
        System.exit(1);
        System.out.println("\njButton2_actionPerformed(ActionEvent e) called.");

    }


}

It is not encouraged to post such straight forward solution here. This forum definitely discourage the "copy-paste" manner.

i really don't understand why..

a java programming that will enter a unique username and pasword..

Post deleted - start a new topic please

DaniWeb Member Rules (which you agreed to when you signed up) include:
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Please start your own new thread for your question, and post your code to show what you have done so far.

We're happy to help you, but we're not here to do all the work, because you simply don't learn anything that way.