Java Array, Finding Duplicates

Question

I have an array, and am looking for duplicates.

duplicates = false;
for(j = 0; j < zipcodeList.length; j++){
    for(k = 0; k < zipcodeList.length; k++         


        

Answer 1

How about using this method?

HashSet zipcodeSet = new HashSet(Arrays.asList(zipcodeList));
duplicates = zipcodeSet.size()!=zipcodeList.length;