Double click the odbcad32.exe file located in the following folder
Steps for Setting DSN in for Oracle database and MSAccess database in Windows 7 have been mentioned here. Driver used for Oracle database is Microsoft ODBC for Oracle and for MSAccess database is Microsoft Access Driver (*.mdb). While executing java file with connectivity code the database pointed by the corresponding DSN will be referred for operation
C:\Windows\SysWOW64\odbcad32.exe
(or)
C:\Windows\system32\odbcad32.exe
(or)
Control panel -> System and Security -> Administrative Tools -> Data Sources (ODBC)
Database for the corresponding DSN has to be created in Oracle Databse homepage