Dúvida em consulta no postgreSQL

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

/**
 *
 * @author matakura
 */
public class DaoConnectionFactory {

    private static final String DRIVER_POSTGREE = "org.postgresql.Driver";
    private static final String POSTGREE_PROTOCOL = "jdbc:postgresql://";

    private DaoConnectionFactory()
    {

    }
    /**
    * Returns a connection to the specified driver.
    */
    public static Connection getConnection(String serverIpNumber, String esquemaDeBanco ,String portNumber, String user, String passwd)
    {
        try
        {
            /**
             * Loads the driver.
             */
            DaoConnectionFactory.loadDriver(DRIVER_POSTGREE);

            /**
             * Creates and returns the connection.
             */
            Connection connection = DriverManager.getConnection(POSTGREE_PROTOCOL + serverIpNumber + ":" + portNumber + "/" + esquemaDeBanco, user, passwd);
            return connection;
        }
        catch(NullPointerException nullPointerException)
        {
            nullPointerException.printStackTrace();
            return null;
        }
        catch(SQLException sQLException)
        {
           sQLException.printStackTrace();
           return null;
        }
    }

    /**
     * Loads the driver connection.
     */
    private static void loadDriver(String urlClass)
    {
        try
        {
             Class.forName(urlClass);
        }
        catch(NullPointerException nullPointerException)
        {
            nullPointerException.printStackTrace();
        }
        catch(ClassNotFoundException classNotFoundException)
        {
            classNotFoundException.printStackTrace();
        }
    }
}

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.HashMap;

/**
 *
 * @author matakura
 */
public class Misturador {

    private HashMap<Integer, Integer> input_to_output;
    private HashMap<Integer, Integer> output_to_input;

    private Misturador()
    {
         try
         {
             Connection myConnection = DaoConnectionFactory.getConnection("localhost", "Criptografia", "5432", "root", "[telefone removido]");

             Statement myStatement = myConnection.createStatement();

             ResultSet myResultSet = myStatement.executeQuery("SELECT * FROM pessoa" );
             while(myResultSet.next())
             {
                 System.out.println(myResultSet.getString(1));
             }
         }
         catch(NullPointerException nullPointerException)
         {
             nullPointerException.printStackTrace();
         }
         catch(SQLException sQLException)
         {
             sQLException.printStackTrace();
         }
    }

    public static void main(String args[])
    {
        Misturador m = new Misturador();
    }

}