code fragment gives a simple example of these three steps

public void connectToAndQueryDatabase(String username, String password) {    Connection con = DriverManager.getConnection     ("jdbc:myDriver:myDatabase", username, password);    Statement stmt = con.createStatement();   ResultSet rs = stmt.executeQuery("SELECT a, b, c FROM Table1");   while (rs.next()) {     int x = rs.getInt("a");     String s = rs.getString("b");     float f = rs.getFloat("c");   }   // ...