Java Set equality ignore case

Question

I want to check if all elements of two sets of String are equal by ignoring the letter\'s cases.

Set set1 ;
Set set2 ;
.
.
.
if(s         


        

Answer 1

I would build something like this (in some form of Java pseudo code):

Set set1;
Set set2;

if (set1.size() != set2.size()) {
  return NOT_EQUAL;
} else {
  Set set3 = new HashSet();
  for (String s: set1) set3.add(s.toUpperCase());
  for (String s: set2) set3.add(s.toUpperCase());
  return set1.size() == set3.size() ? EQUAL : NOT_EQUAL;
}