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

public void realizaConexion(){
            Connection conn = null;
            String urlDatabase =  "jdbc:postgresql://localhost:0000/midatabase";
            try {
                Class.forName("org.postgresql.Driver");
                conn = DriverManager.getConnection(urlDatabase,  "usuario", "password");
            } catch (Exception e) {
                System.err.println("Ocurrio un error : "+e.getMessage());
            }
            System.out.println("La conexión se realizo sin problemas! =) ");
}