import javax.swing.*;
  public class frame{
  public static void main(String[] args){

  String username= "marko";
  String password ="12345";
  JFrame frame= new JFrame("registration");
  ImageIcon icon = new ImageIcon("C:/Users/mars/Desktop/reddit.png");
  frame.setIconImage(icon.getImage());


  JTextField[] fields= {new JTextField(), new JTextField()};
  Object[] surface = {"Username", fields[0], "password", field[1]};

  int click= JOptionPane.showConfirmDialog(frame,surface, "Reddit
  registration",2,2,icon);

  String eusername= fields[0].getText();
  String epassword= fields[1].getText();

     if ((click == 0) & (username==eusername) & (password==epassword))
     {
     JOptionPane.showMessageDialog(null,"Thank you very
     much","registration",2,icon);
     }

     else
    {
     JOptionPane.showMessageDialog(null,"Please try again",
    "entry","registration",2,icon);
    }

    }
  }