Example

Postgres.java

package cl.bgmp;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Properties;

public class Main {

    public static void main(String[] args) throws SQLException {
        Connection connection = null;

        String pass = "bdi2020m";
        String user = "bdi2020m";

        try {
            Class.forName("org.postgresql.Driver");
            String url = "jdbc:postgresql://plop.inf.udec.cl/bdi2020m";

            Properties props = new Properties();
            props.setProperty("user", user);
            props.setProperty("password", pass);
            props.setProperty("ssl", "false");

            connection = DriverManager.getConnection(url, props);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
            return;
        }

        PreparedStatement statement = connection.prepareStatement("SELECT * FROM casino");
        ResultSet resultSet = statement.executeQuery();
        resultSet.next();
        System.out.println(resultSet.getString(4));
    }
}