Regarding Independent Drivers for Java Application

[srinath jeyanthi]

Hello,
In my Apllication have Different OS's But Oracle Server(DataBAse) Running In Unix OS.But My code is work for all
type of Client Operating System.In This Situation How to write code for OS independent Application.
please clearly explain the Type 4 driver.

[rani bedi]

The native-protocol/all-Java driver (JDBC driver type 4) converts JDBC calls into the vendor-specific database management system protocol so that client applications can communicate directly with the database server. These Drivers are completely implemented in Java to achieve platform independence and eliminate deployment administration issues.
Advantages -Type 4 JDBC drivers don't have to translate database requests to ODBC or a native connectivity interface or to pass the request on to another server, performance is typically quite good. Moreover, the native-protocol/all-Java driver boasts better performance than types 1 and 2. Also, there's no need to install special software on the client or server. Further, these drivers can be downloaded dynamically.
Disadvantages - With type 4 drivers, the user needs a different driver for each database.

[rani bedi]

For intranet applications it would be useful to consider type 2 drivers. But since type 3 and type 4 drivers show significantly better performance than type 2 drivers and the trend is towards development of more robust pure-Java drivers, it might be useful to evaluate type 3 or type 4 for intranet situations too.
For Internet-related applications, there is no option but to use type 3 or type 4 drivers. Type 3 drivers are best suited for environments that need to provide connectivity to a variety of DBMS servers and heterogeneous databases and that require significantly high levels of concurrently connected users where performance and scalability are major concerns. Type 4 drivers are generally aimed at the workgroup level.