DELETE query in Multi Threads

I want to delete bunch of records from a table like,

delete from Table1 where col1 in (select col1 from Table2);

now col1 from Table2 will be some where b/w 200-500.
But Table1 will be having 3000-5000 records for a single entry from Table2.

Hence instead of deleting at a stretch, I want to get the col1 from Table2
in some Java datastructures...

And I want to delete the records using Threads.. like 5 threads at a time deleting records from Table1 for 5 entries from Table2.

I dont know whether it will work. I'm not aware of the Lock during delete operation. Please tell me whether it will work.. Or please suggest some solution..

That can be done. But that will be a serial operation.
atleast 1000 delete statements will be executed.
Each delete statements will delete atleast 5000 records.

But 5000 records deleted by one delete query is independant of all other delete statements.
Hence What I need is, If the DB2 is capable of processing concurrent delete statements, then I can issue more than one deletes at a time (using a multi thread pgm in Java). Which will improve performance I hope.

But I'm not sure whether I can do it? is it possible to execute concurrent delete statements (which will delete independant set of records)?