MD5 Encrypt

package it.main.view;

import java.awt.FlowLayout;
import java.security.MessageDigest;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.xml.bind.annotation.adapters.HexBinaryAdapter;

@SuppressWarnings("serial")
public class Md5Frame extends JFrame {

    public Md5Frame() {

        JFrame mainFrame = new JFrame("MD5 Encrypter");
        JLabel mainLabel = new JLabel("String to Encrypt");
        JTextField textField = new JTextField(25);
        JButton mainButton = new JButton("Encrypt");


        mainFrame.setLayout(new FlowLayout());
        mainFrame.setSize(450, 150);
        mainFrame.add(mainLabel);
        mainFrame.add(textField);
        mainFrame.add(mainButton);
        mainFrame.setLocationRelativeTo(null);
        mainFrame.setVisible(true);


        mainButton.addActionListener(e -> {

            try {
                MessageDigest md5 = MessageDigest.getInstance("MD5");
                String hex = (new HexBinaryAdapter()).marshal(md5.digest(textField.getText().getBytes()));

                JOptionPane.showMessageDialog(mainFrame, hex.toLowerCase());

            } catch (Exception e2) {
                JOptionPane.showMessageDialog(mainFrame, "C'è stato un errore");
            }
        });
    }
}