Hello JDBC

Main.java

import java.sql.*;

public class Main {
    public static void main(String[] args) throws SQLException {
        String url = "jdbc:postgresql://localhost:5432/books";
        String user = "postgres";
        String password = "myverysecretpassword";

        Connection conn = DriverManager.getConnection(url, user, password);
        Statement stmt = conn.createStatement();

        // Lire les données
        ResultSet rs = stmt.executeQuery("SELECT * FROM authors");
        while (rs.next()) {
            System.out.println(rs.getInt("au_id") + ": " + rs.getString("au_fname"));
        }
    }
}