Class PasswordManagerGUI

PasswordManagerGUI.java:16–184

import java.util.Base64;

public class PasswordManagerGUI extends JFrame implements ActionListener {

    private static final String SECRET_KEY_ALGORITHM = "AES";
    private static final String CIPHER_ALGORITHM = "AES/CBC/PKCS5Padding";
    private static final int KEY_LENGTH = 256;
    private static final int SALT_LENGTH = 16;
    private static final int ITERATIONS = 65536;
    private static final int IV_LENGTH = 16;
    private static final String ENCRYPTED_PASSWORD_FILE = "encrypted_password.txt";

    private JTextField masterPasswordField, passwordField, encryptedPasswordField, decryptedPasswordField, encryptedPasswordfileField;

    public PasswordManagerGUI() {
        setTitle("Password Manager");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(600, 500);
        setLocationRelativeTo(null);

        JPanel mainPanel = new JPanel();
        mainPanel.setLayout(new GridLayout(6, 2, 10, 10));
        mainPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));

	Font labelFont = new Font("Arial", Font.PLAIN, 16); // Adjust the font size as needed
	Font textFieldFont = new Font("Arial", Font.PLAIN, 16); // Adjust the font size as needed


        JLabel masterPasswordLabel = new JLabel("Master Password:");
	masterPasswordLabel.setFont(labelFont);
        masterPasswordField = new JPasswordField();
	masterPasswordField.setFont(textFieldFont);

        JLabel passwordLabel = new JLabel("Password:");
	passwordLabel.setFont(labelFont);
        passwordField = new JPasswordField();
	passwordField.setFont(textFieldFont);	

        JLabel encryptedPasswordLabel = new JLabel("Encrypted Password:");
        encryptedPasswordLabel.setFont(labelFont);
	encryptedPasswordField = new JTextField();
        encryptedPasswordField.setEditable(false);
	encryptedPasswordField.setFont(textFieldFont);

	JLabel encryptedPasswordfileLabel = new JLabel("Encrypted Password, Check File!");
	encryptedPasswordfileLabel.setFont(labelFont);
	encryptedPasswordfileField = new JTextField();
        encryptedPasswordfileField.setEditable(false);
        encryptedPasswordfileField.setFont(textFieldFont);
	

        JLabel decryptedPasswordLabel = new JLabel("Decrypted Password:");
        decryptedPasswordLabel.setFont(labelFont);
	decryptedPasswordField = new JTextField();
        decryptedPasswordField.setEditable(false);
	decryptedPasswordField.setFont(textFieldFont);

        JButton encryptButton = new JButton("Encrypt");
        JButton decryptButton = new JButton("Decrypt");