Mostrar no jComboBox

 try {
            //Registra JDBC driver
            Class.forName("com.mysql.jdbc.Driver");

            //Abrindo a conexão
java.sql.Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/pessoas?zeroDateTimeBehavior=convertToNull", "root", "");
            //Executa a query de seleção
            java.sql.Statement st = conn.createStatement();
            st.executeQuery("select * from usuarios");
            ResultSet rs = st.getResultSet();



//...
//...
while(rs.next()){
 jComboBox1.addItem( rs.getString("Nome"));
 }}
        catch (SQLException | ClassNotFoundException e) {
            JOptionPane.showMessageDialog(rootPane, e);
        }
 // Coloca dentro do evento que abre com a janela blz ?
// Vlw !