Using a generic Iterator to compute the average length of the Strings in a generic Set : generics « Utility Classes « SCJP

1. SCJP
2. Utility Classes
3. generics

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

public class MainClass {
  public static void main(String[] argv) {
    Set<String> stringSet = new HashSet<String>();
    stringSet.add("aaaa");
    stringSet.add("a");
    stringSet.add("aa");
    stringSet.add("aaa");

    float totalLengths = 0f;
    Iterator<String> iter = stringSet.iterator();
    while (iter.hasNext()){
      totalLengths += iter.next().length();
    }

  }
}