Using "where col in (?)"

I am getting the following JDBC error:

ERROR: operator does not exist: integer = integer[]
Hint: No operator matches the given name and argument types. You might
need to add explicit type casts. Position: 37

My query looks like this:

select * from se_user where user_id in (?)

I am using a prepared statement.

I am doing:

Integer [] ary = new Integer[]{ 3, 4, 5 };
pstmt.setArray(1, conn.createArrayOf("integer", ary));

I also tried:

Integer [] ary = new Integer[]{ 3, 4, 5 };
pstmt.setObject(1, conn.createArrayOf("integer", ary));

Neither worked. user_id is an integer column.

Sure appreciate some help.

Thanks!

Blake McBride