java login system

import java.awt.event.*;
import java.awt.*;
import java.applet.*;
import javax.swing.*;
import javax.swing.JOptionPane;
import javax.swing.JWindow;
import java.lang.*;
import java.util.Scanner;

public class sa extends JFrame implements  ActionListener {
    JButton b1;
    JButton b3, b4;
    Container con = getContentPane();
    JPanel panel;
    JLabel fu, ad, re, ren, reg, age;
    JTextField ful, addr, ref, refn, agg;
    JCheckBox c = new JCheckBox("Show Password");
    Choice ch = new Choice();
        CheckboxGroup gp = new CheckboxGroup();
                Checkbox male = new Checkbox("Male", gp, false);
                    Checkbox female = new Checkbox("Female", gp, false);
                        Checkbox other = new Checkbox("Other", gp, false);
                            JLabel gender = new JLabel("Gender");
                                            JPasswordField pass;
                                            JButton b5, b6;
                                            JTextField user;
                                            JPasswordField ps, pw;
                                            JTextField username;

    sa()
    {
        Scanner iput = new Scanner(System.in);
        age = new JLabel("Age");
                                fu= new  JLabel("Enter Full Name");
                                ad= new JLabel("Enter Adress");
                                re= new JLabel("Who Refers you to join the company?");
                                ren= new JLabel("Enter Referral ID number");
                                ful= new JTextField(15);
                                ful.addActionListener(this);
                                addr= new JTextField(15);
                                addr.addActionListener(this);
                                ref = new JTextField(15);
                                refn = new JTextField(15);
                                reg = new JLabel("                       REGISTER                       ");
                                agg = new JTextField(10);

        //proceed button
        b1 = new JButton("Proceed");
        b1.setBackground(Color.GREEN);
        //JButton Action
        b1.addActionListener(this);
        //Jpanel
        panel = new JPanel();
        con.setLayout(new BorderLayout());


        //
        panel.add(reg);
        //full name
        panel.add(fu);
        panel.add(ful);
        //address
        panel.add(ad);
        panel.add(addr);
        //gender
        panel.add(gender);
        panel.add(male);
        panel.add(female);
        panel.add(other);
        //age
        panel.add(age);
        panel.add(agg);
        //referral
        panel.add(re);
        panel.add(ref);
        //
        panel.add(ren);
        panel.add(refn);









        //button
        panel.add(b1);

        con.add(panel);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    }
    public void actionPerformed(ActionEvent e){
        Object source = e.getSource();
        String fname=ful.getText();
        String nn=addr.getText();
        String nnn=ref.getText();
        String nmn=refn.getText();
        String agr=agg.getText();
        if(source==b1){
        if(fname.isEmpty()){
            JOptionPane.showMessageDialog(null, "You didn't enter your name");

        }
        else if(nn.isEmpty()){
            JOptionPane.showMessageDialog(null, "Please enter your address");
        }
        else if(agr.isEmpty()){
            JOptionPane.showMessageDialog(null, "Please Verify Age");
        }
        else if(nnn.isEmpty()){
            JOptionPane.showMessageDialog(null, "Please fill refferal's name");
        }
        else if(nmn.isEmpty()){
            JOptionPane.showMessageDialog(null, "Please enter referral's ID number");
        }
        else{
            JFrame frame;
            JPanel pan;
            JLabel l, lp, lpr;
            Checkbox ch;

            frame = new JFrame("Acct Fill up");
            frame.setVisible(true);
            frame.setBounds(450, 100, 175, 275);
            frame.setVisible(true);
            frame.setResizable(false);

                pan = new JPanel();

                    l = new JLabel("Enter User ID");
                    lp = new JLabel("Enter Password");
                    lpr = new JLabel("Verify Password");
                    user = new JTextField(10);
                    ps = new JPasswordField(10);
                    pw = new JPasswordField(10);
                    b3 = new JButton("Register");
                    b4 = new JButton("Cancel");
            //username
            pan.add(l);
            pan.add(user);
            //password
            pan.add(lp);
            pan.add(ps);
            //verify
            pan.add(lpr);
            pan.add(pw);


            pan.add(b3);
            b3.setBackground(Color.ORANGE);
            pan.add(b4);
            b4.setBackground(Color.RED);
            b4.addActionListener(this);
            frame.add(pan);
            Object src = e.getSource();
            b3.addActionListener(this);
        }
        }
        String us = user.getText();
        String zx = ps.getText();
        String cx= pw.getText();
        String cv = ps.getText();
        String vc = pw.getText();
        int length = 0;
        int numCount = 0;
        int capCount = 0;
        int x;
        String result;



         if(source==b3){
            if(us.isEmpty()){
            JOptionPane.showMessageDialog(null,"Please Confirm User ID");
        }
        else if(zx.isEmpty()){
            JOptionPane.showMessageDialog(null, "Please Enter Password");
        }
        for(x=0; x<cv.length(); x++){
            if(cv.charAt(x)>=47 && cv.charAt(x)<=58 || (cv.charAt(x) >= 65 && cv.charAt(x)<=91) || (cv.charAt(x)>=97 && cv.charAt(x) <= 122)){
            }
            else{
                JOptionPane.showMessageDialog(null, "Please make stronger password");
            }
            if((cv.charAt(x) > 47 && cv.charAt(x) < 58)){
                numCount++;
            }

            if((cv.charAt(x) > 64 && cv.charAt(x)<91)){
                capCount++;
            }
            length = (x+1);
        }
        if(numCount < 2){
            JOptionPane.showMessageDialog(null, "Not enough Numbers in password");
        }
        else if(capCount < 2){
            JOptionPane.showMessageDialog(null, "Not enough Capital letters in password");
        }
        else if(length < 8){
            JOptionPane.showMessageDialog(null, "Password too short, Please make Stronger Password");
            JOptionPane.showMessageDialog(null, "must be atleast 8 characters long");
        }

        else if(cx.isEmpty()){
            JOptionPane.showMessageDialog(null, "Please Verify your Password");
        }
        //your problem...
        else if(cx!=zx){
            JOptionPane.showMessageDialog(null, "Please Verify your Password");
        }
        else{
            JOptionPane.showMessageDialog(null, "Registered Successfully!");
            JOptionPane.showConfirmDialog(null, "Do you want to login now?");

            JWindow window = new JWindow();
            window.getContentPane().add(new JLabel("", new ImageIcon("3.png"),SwingConstants.CENTER));
            window.setBounds(450, 100, 320, 240);
            window.setSize(650,400);
            window.setVisible(true);
            try{
            Thread.sleep(5000);
            }
            catch(InterruptedException ex){}
            window.dispose();


            JFrame frame = new JFrame("Login");
            frame.setVisible(true);
            frame.setBounds(450, 100, 185,265);
            frame.setResizable(false);
            JLabel l, la;

            l = new JLabel("UserID");
            la = new JLabel("Password");
            JPanel p =new JPanel();




                user = new JTextField(15);
                    pass = new JPasswordField(15);
                        pass.setEchoChar('•');
                            pass.addActionListener(this);
                                user.addActionListener(this);

                                b5 = new JButton("Login");
                                    b6 = new JButton("Cancel");
                                    b5.addActionListener(this);
                                    b5.addActionListener(this);


                p = new JPanel();
                        //loigin
                        p.add(l);
                        p.add(user);
                        p.add(la);
                        p.add(pass);
                        p.add(c);

                        p.add(b5);
                        p.add(b6);
                        b5.setBackground(Color.GREEN);
                        b6.setBackground(Color.ORANGE);
                        frame.add(p);
                        c.addActionListener(this);
                        b5.addActionListener(this);
                        b6.addActionListener(this);
                }
        }
        if(source==b5){
            String uname=user.getText();
            String psd=pass.getText();
            String meme=user.getText();
            String memee=pass.getText();

                String userr=user.getText();
                String passw=ps.getText();
                String passs=pw.getText();
                    String name=ful.getText();
            if(uname.equals(userr) && psd.equals(passw) && psd.equals(passs)){
                JOptionPane.showMessageDialog(null, "Welcome " + name + "!");
                JFrame f1;
                f1 = new JFrame("WELCOME!");
                f1.setVisible(true);
                f1.setSize(5000,5000);
                f1.setResizable(false);
            }
            else if(meme.equals("Administrator") && memee.equals("123")){
                JOptionPane.showMessageDialog(null, "Welcome back Admin");
                JButton bn;
                    JFrame f2;
                    JLabel la,al;
                    f2 = new JFrame("WELCOME!");
                    f2.setVisible(true);
                    f2.setSize(5000,5000);
                    f2.setResizable(false);
                    la = new JLabel("Administrator", SwingConstants.CENTER);
                    f2.add(la);
            }
            else{
                JOptionPane.showMessageDialog(null, "Invalid Username or Password");
            }

        }
        else if(source==b6){
            System.exit(0);
        }

        else if(source==b4){
            System.exit(0);
        }
        else{
        }
        if(c.isSelected()){
                    pass.setEchoChar((char)0);
                }
                else{
                    pass.setEchoChar('•');
                }


    }
    public static void main(String[]args){
        JWindow window = new JWindow();
        window.getContentPane().add(new JLabel(" ", new ImageIcon("3.png"),SwingConstants.CENTER));
        window.setBounds(450, 100, 320, 240);
        window.setSize(600,398);
        window.setVisible(true);
        try{
            Thread.sleep(0);
        }
        catch(InterruptedException e){}
        window.dispose();

        sa frm = new sa();
        frm.setVisible(true);
        frm.setResizable(false);
        frm.setTitle("Aim Global");
        frm.setBounds(500,150,222,375);
        //END
    }
}