Java autoboxing and ternary operator madness

Question

Just spent a frustrating couple of hours debugging this code:

    LinkedHashMap rsrqs = new LinkedHashMap();
           


        

Answer 1

Well, Integer.valueOf(String) returns an Integer and -1 is a primitive int. The first example is forced to unbox because one term is a primitive. You could also have used

Integer boxedRsrq = boxedPci != null ? 
    rsrqs.get(boxedPci.toString()) : (Integer) -1;

which would have boxed the -1.