Hi Satish,
First try this.
Right click on your HANA instance in Navigator panel and choose Restart. If does not work then try below.
We can create ODBC driver (I am not sure of JDBC driver) from the control panel but it is worth to give a try.
Go to Control Panel -> Administrators Tools -> Data Sources (ODBC) - System DSN -> Add -> HDBODBC and provide Data Source Name.
Server:Port value is server_name:3xx15 where xx is the Instance number.
Regards
Raj