Inserir no banco de dados MySql

public class Cadastro {

    public String Nome;

    public void setNome(String Nome){
        this.Nome = Nome;
    }

    public String getNome(){
        return Nome;
    }

}

import java.sql.*;
import javax.swing.JOptionPane;

public class Incluir {
    public void incluir(Cadastro cadastro){
        
        try{
            String driver  = "org.gjt.mm.mysql.Driver";
            String url =  "jdbc:mysql://localhost/java";
            Class.forName(driver);
            Connection conn = DriverManager.getConnection(url,"root","key1451");

            String sql = "INSERT INTO cadastro (nome)" + "VALUES (?)";

            PreparedStatement ps = conn.prepareStatement(sql);
            ps.setString(1,cadastro.getNome());
            ps.execute();
            conn.close();
        }
        catch(Exception e){
            JOptionPane.showMessageDialog(null, "Não foi inserido");
        }

    }
}

import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * Formulario.java
 *
 * Created on 04/10/2010, 09:46:34
 */

/**
 *
 * @author Mauro
 */
public class Formulario extends javax.swing.JFrame {

    /** Creates new form Formulario */
    public Formulario() {
        initComponents();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        lbl_nome = new javax.swing.JLabel();
        tf_nome = new javax.swing.JTextField();
        bt_enviar = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        lbl_nome.setText("Nome:");

        tf_nome.setText("jTextField1");

        bt_enviar.setText("Enviar");
        bt_enviar.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                bt_enviarActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(lbl_nome)
                .addGap(18, 18, 18)
                .addComponent(tf_nome, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(bt_enviar)
                .addContainerGap(207, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(lbl_nome)
                    .addComponent(tf_nome, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(bt_enviar))
                .addContainerGap(266, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>

    //Aqui seria a ação do botão mas não sei o que colocar
    private void bt_enviarActionPerformed(java.awt.event.ActionEvent evt) {
        
    }

   
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Formulario().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify
    private javax.swing.JButton bt_enviar;
    private javax.swing.JLabel lbl_nome;
    private javax.swing.JTextField tf_nome;
    // End of variables declaration

}