How Does DriverManger -return a Connection Object

DriverManger has a static method called -static Connection getConnection(String url, String user, String password)--> Attempts to establish a connection to the given database URL.

which returns a Connection Object.
The returned Connection Object is an Interface.
Connection con=DriverManger.getConnection(String url, String user, String password)


http://docs.oracle.com/javase/1.5.0/docs/api/java/sql/DriverManager.html

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