The program I’m designing allows users to change an admin password ONLY AFTER entering the current admin password into a password field in the class setupModeLock below. However, the password never saves to the setupModeLock variable pWord

import javax.swing.*;
import java.awt.event.*;
public class setupModeLock {
    private static int pWord;
    public final JFrame miniScreen;
    setupModeLock() {
        miniScreen = new JFrame("Setup Mode");
        final JLabel info = new JLabel("Please enter an admin password");
        final JPasswordField adminField = new JPasswordField();
        final JLabel result = new JLabel("");
        info.setBounds(120, 300, 200, 30);
        adminField.setBounds(120, 325, 200, 30);
        result.setBounds(200, 325, 400, 30);
        miniScreen.add(info);
        miniScreen.add(adminField);
        miniScreen.add(result);
        adminField.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent code) {
                String password = new String(adminField.getPassword());
                try {
                    int val = Integer.parseInt(password);
                    if(val == pWord) 
                    {       
                        miniScreen.dispose();
                        new setUpMode()
                    }
                    else
                    {
                        adminField.setText("");
                        result.setText("Incorrect Password");
                    }
                } catch (Exception e) {
                    adminField.setText("");
                    result.setText("Invalid Password");
                }
            }
        });
        miniScreen.setSize(780,700);
        miniScreen.setVisible(true);
        miniScreen.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    }
    public static void changePassword(int newPass)
    {
        pWord = newPass;
    }
    public static int getPword()
    {
        return pWord;
    }
}

The next class actually displays the button that changes the password

import javax.swing.*;
import java.awt.event.*;
public class setUpMode extends setupModeLock{
    public JFrame window;
    setUpMode() {
        super();
        miniScreen.dispose();
        window = new JFrame();
        window.setAlwaysOnTop(true);
        JButton modPassword = new JButton("Change Admin Password");
        modPassword.setBounds(1000, 800, 300, 30);
        window.add(modPassword);
        modPassword.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent c) {
                new PasswordChanger();
            } 
        });
    }
}

In the class PasswordChanger, the user enters the password to the PasswordField, and then uses the inherited method changePassword to change the password in setUpModeLock

import javax.swing.*;
import java.awt.CardLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class PasswordChanger extends setupModeLock implements ActionListener {
    JPasswordField thisField;
    JLabel success;
    Container container;
    CardLayout cardlayout;

    PasswordChanger() {
        super();
        miniScreen.dispose();
        JFrame newPlace = new JFrame("Change Password");
        container = newPlace.getContentPane();
        cardlayout = new CardLayout();
        container.setLayout(cardlayout);
        success = new JLabel("");
        thisField = new JPasswordField();
        thisField.addActionListener(this);
        container.add("a", thisField);
        container.add("b", success);
        newPlace.setSize(300,100);
        newPlace.setVisible(true);
        newPlace.setLocationRelativeTo(null);
        newPlace.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    }
    public void actionPerformed(ActionEvent bro) {
        val = new String(thisField.getPassword());
        try
        {
            int pCode = Integer.parseInt(val);
            changePassword(pCode);
            success.setText("Password successfuly save. Exit now");
        } catch(Exception e) {
            success.setText("Faulty Password type. Exit and try again");
        }
        cardlayout.next(container);
    }
}

But after running it, not even the Change Password JButton appears in setupMode.

I tried inheriting over multiple classes, but my password always remains at 0. What can I do to modify the password in setUpModeLock so that any call to changePassword() will make the new password a constant in all subclasses.