Java - ClassCastException

Question

This may be the wrong forum to post my topic.
I searched but couldn't find the right forum.
I'm thankful if you can solve my issue or let me know the right forum to post this topic.
I'm a oracle developer. I'm trying to write a Jdbc file to display the output of a Stored Procedure.
When I try to run my code, I'm getting this ClassCast Exception
create or replace TYPE NUMTABLE AS TABLE OF INTEGER;
Below is a part of my code:
stmt.setArray(1,testIdList);
stmt.registerOutParameter(2,OracleTypes.ARRAY, "NUMTABLE");
stmt.registerOutParameter(3,OracleTypes.ARRAY, "NUMTABLE");
stmt.registerOutParameter(4,OracleTypes.VARCHAR);
// Execute the statement...
System.out.println("Executing callable statement...");
stmt.execute();
//Pring Attr_id's
System.out.println("Attr ids ");
ARRAY attrIds = stmt.getARRAY(2);
Integer[] sampleAttr = (Integer[])attrIds.getArray(); //this is where I'm getting the error.
for (int i = 0; i < sampleAttr.length; i++)
System.out.println(sampleAttr);
How can this be solved?
Thanks and Regards.

Answer 1

When I try with BigDecimal its working.
BigDecimal[] sampleAttr = (BigDecimal[]) attrIds.getArray();
Why is the compiler forcing me to use BigDecimal and not allowing Integer?