Table Locking in Insert Command.

Hi,

i have a java based tool which does insert operation in a TABLE, and in parallel the same table is used by my C++ code which does select Query.

the Table will be always busy, but sometimes the table is getting locked when i try to make an insert, am bit confused whether the lock is because of SELECT query from my C++ code or by the INSERT QUERY from the java Tool.

Do i need to modify the Query if so how..? and from the google i learnt that select puts an internal LOCK.

currently am locking the table before insert below is my query

lock table table_name in exclusive mode nowait

and giving a commit after performing the DML operation so that lock will be removed automatically.

can anyone please solve my query.?

thanks,
senthil