Connection interface

Question

Without implementing Connection interface in our class how we are using the some methods of that interface.
eg.
public class JDBCConnection
public JDBCConnection()
try
Class.forName("com.mysql.jdbc.Driver").newInstance();
con= DriverManager.getConnection("jdbc:mysql://192.168.1.80/bizicommerce","bipin","admin");
st=con.createStatement();
System.out.println("Connection Established");
catch(Exception e)
System.out.println("Exception in connection"+e.getMessage());
Bipin.V
                    }

Answer 1

Without implementing Connection interface in our
class how we are using the some methods of that interface.Someone else did implement it (in this case: the MySQL staff).
Edit: print the result of con.getClass().getName() to see what class provides the implementation.