calling a method of the interface which was not implemented in any class

[Choubey]

hi everybody,

Iam a java programmer actually i want to know how the Connection
object is created through DriverManager.getConnection when
DriverManager class is not implements Connection interface and no class
in java implementas interface connection so how can we get a object
reference for connection object and call a getconnection method through
the connection object. i seen that there are lots of interface in java
which are not implemented on java but we take a reference of thet
interface and we call a method of that interface. how it is possible
coz interface have simple method declaration implementation in the
class which implement this inteface. so plz help me for this problem.
aim waiting for somebodies replay.
thanks
Choubey

[Raymond DeCampo]

Choubey wrote:

hi everybody,

Iam a java programmer actually i want to know how the Connection
object is created through DriverManager.getConnection when
DriverManager class is not implements Connection interface and no class
in java implementas interface connection so how can we get a object
reference for connection object and call a getconnection method through
the connection object. i seen that there are lots of interface in java
which are not implemented on java but we take a reference of thet
interface and we call a method of that interface. how it is possible
coz interface have simple method declaration implementation in the
class which implement this inteface. so plz help me for this problem.
aim waiting for somebodies replay.

The implementations for java.sql.Connection, java.sql.Statement,
java.sql.ResultSet, etc. are usually provided by the JDBC driver. A
JDBC driver is usually provided by the database vendor, or sometimes via
third parties.

The philosophy behind this mechanism is that by providing interfaces,
the application programmer (you) can write code that uses the interfaces
only. Then you can load whichever JDBC driver you want at run-time,
without changing your code.

HTH,
Ray

--
XML is the programmer's duct tape.

[Choubey]

hi ray

thank you for your reply.
bye
Dharmendra