Registration Form

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;


public class Regis extends JFrame implements ActionListener, KeyListener{

    Regis(){
        setFocusable(true);
        template();
        frame();
        pack();
        setLocationRelativeTo(null);
    }

    void frame(){
        setVisible(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setTitle("Form Registrasi");
    }
    //layout
    JPanel form=new JPanel(new GridLayout(9,1));
    JPanel hobi = new JPanel(new GridLayout(3,1));
    JPanel cit = new JPanel(new GridLayout(1,2));
    JPanel gender = new JPanel(new GridLayout(1,2));
    JPanel tombol = new JPanel(new GridLayout(1,4));
    JPanel b1 = new JPanel(new GridLayout(1,2));
    JPanel b2 = new JPanel(new GridLayout(1,2));
    JPanel b3 = new JPanel(new GridLayout(1,2));
    JPanel b4 = new JPanel(new GridLayout(1,2));
    JPanel b5 = new JPanel(new GridLayout(1,2));
    JPanel b6 = new JPanel(new GridLayout(1,2));
    JPanel b7 = new JPanel(new GridLayout(1,2));
    //font
    Font f=new Font("SansSerif",Font.BOLD, 50);
    //component
    JLabel id=new JLabel();
    JPasswordField pass1=new JPasswordField();
    JPasswordField pass2=new JPasswordField();
    JRadioButton male=new JRadioButton("Male");
    JRadioButton female=new JRadioButton("Female");
    ButtonGroup gen=new ButtonGroup();
    JCheckBox bdm=new JCheckBox("Badminton");
    JCheckBox cdg=new JCheckBox("Coding");
    JCheckBox drw=new JCheckBox("Drawing");
    String[] citizen = { "","Indonesia","Other"};
    JComboBox ctz=new JComboBox(citizen);
    JLabel gambar=new JLabel();
    String[] item = { "item 1","item 2","item 3","item 4","item 5","item 6","item 7"};
    JList itm=new JList(item);
    JScrollPane items=new JScrollPane(itm);
    JButton submit = new JButton("Submit");
    JButton reset = new JButton("Reset");

    void template(){
        //baris 1 judul
        JLabel header=new JLabel("REGISTRATION");
        header.setFont(f);
        form.add(header);
        //baris 2 user id : .....
        b1.add(new JLabel("User ID"));
        b1.add(id);
        form.add(b1);
        //baris 3 password:.....
        b2.add(new JLabel("Password"));
        b2.add(pass1);
        form.add(b2);
        //baris 3 Confirmation password:.....
        b3.add(new JLabel("Confirmation Password"));
        b3.add(pass2);pass2.addKeyListener(this);
        form.add(b3);
        //baris 4 gender
        b4.add(new JLabel("Gender"));
        gen.add(male);male.addActionListener(this);
        gen.add(female);female.addActionListener(this);
        gender.add(male);
        gender.add(female);
        b4.add(gender);
        form.add(b4);
        //baris 5 Hobby
        b5.add(new JLabel("Hobby"));
        hobi.add(bdm);
        hobi.add(cdg);
        hobi.add(drw);
        b5.add(hobi);
        form.add(b5);
        //baris 6 citizenship
        b6.add(new JLabel("Citizendhip"));
        cit.add(ctz);ctz.addActionListener(this);
        cit.add(gambar);
        b6.add(cit);
        form.add(b6);
        //baris 7 citizenship
        b7.add(new JLabel("Item"));
        b7.add(items);
        form.add(b7);
        //baris 8 tombol
        tombol.add(new JLabel(" "));
        tombol.add(submit);submit.addActionListener(this);
        tombol.add(reset);reset.addActionListener(this);
        tombol.add(new JLabel(" "));
        form.add(tombol);
        //kasih margin masukin ke frame
        form.setBorder(BorderFactory.createEmptyBorder(10,25,10,25));
        add(form);
    }

    public static void main(String[] args) {
        new Regis();
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if(e.getActionCommand().equals("Male"))//cek kalo male
            id.setText("M001");
        else if(e.getActionCommand().equals("Female"))//cek kalo female
            id.setText("F001");
        else if (ctz.getSelectedIndex()==1&&ctz.getActionCommand().equals("comboBoxChanged"))
            //syarat1 :kalo indexnya 1, syarat2: cek hanya saatlagi diubah
            gambar.setIcon(new ImageIcon("Indonesia.jpg"));
        else if (ctz.getActionCommand().equals("comboBoxChanged"))
            //kalo lagi diubah tapi ga indonesia
            gambar.setIcon(new ImageIcon(""));
        if(e.getActionCommand().equals("Reset"))
            reset();
        else if(e.getActionCommand().equals("Submit")){
            if (check()) {
                int jawaban= JOptionPane.showConfirmDialog(null, "Data Benar, Submit?","OK",JOptionPane.YES_NO_OPTION);
                if(jawaban==JOptionPane.YES_OPTION)
                    System.exit(0);
            }
            else
                JOptionPane.showMessageDialog(null, "Data harus dipilih");
        }
        System.out.println(e.getActionCommand());
    }

    boolean check(){
        if(id.getText().equals("")||
            pass1.getText().equals("")||
            !pass1.getText().equals(pass2.getText())||
            (!bdm.isSelected()&&!cdg.isSelected()&&!drw.isSelected())||
            ctz.getSelectedIndex()==0||itm.isSelectionEmpty())
        return false;
        else
            return true;
    }
    void reset(){
        id.setText("");
        pass1.setText("");
        pass2.setText("");
        gen.clearSelection();
        bdm.setSelected(false);
        cdg.setSelected(false);
        drw.setSelected(false);
        ctz.setSelectedIndex(0);
        itm.clearSelection();
    }
    @Override
    public void keyTyped(KeyEvent e) {
    }

    @Override
    public void keyPressed(KeyEvent e) {
    }

    @Override
    public void keyReleased(KeyEvent e) {
        if(pass1.getText().equals(pass2.getText())&&!(e.getKeyCode()=='\n'))
            JOptionPane.showMessageDialog(null, "Sama");
    }

}