thinking in java之Collections工具类的使用

public class Utilities {
 static List<String> list = Arrays.asList(
   "one Two three Four five six one".split(" "));
 public static void main(String[] args) {
    print(list);
    print("'list' disjoint (Four)?: " +
      Collections.disjoint(list,
        Collections.singletonList("Four")));
    print("max: " + Collections.max(list));
    print("min: " + Collections.min(list));
    print("max w/ comparator: " + Collections.max(list,
      String.CASE_INSENSITIVE_ORDER));
    print("min w/ comparator: " + Collections.min(list,
      String.CASE_INSENSITIVE_ORDER));
    List<String> sublist =
      Arrays.asList("Four five six".split(" "));
    print("indexOfSubList: " +
      Collections.indexOfSubList(list, sublist));
    print("lastIndexOfSubList: " +
      Collections.lastIndexOfSubList(list, sublist));
    Collections.replaceAll(list,"one", "Yo");
    print("replaceAll: " + list);
    Collections.reverse(list);
    print("reverse: " + list);
    Collections.rotate(list,3);
    print("rotate: " + list);
    List<String> source =
      Arrays.asList("in the matrix".split(" "));
    Collections.copy(list, source);
    print("copy: " + list);
    Collections.swap(list,0, list.size() - 1);
    print("swap: " + list);
    Collections.shuffle(list,new Random(47));
    print("shuffled: " + list);
    Collections.fill(list,"pop");
    print("fill: " + list);
    print("frequency of 'pop': " +
      Collections.frequency(list,"pop"));
    List<String> dups = Collections.nCopies(3, "snap");
    print("dups: " + dups);
    print("'list' disjoint 'dups'?: " +
      Collections.disjoint(list, dups));
   // Getting an old-style Enumeration:
    Enumeration<String> e = Collections.enumeration(dups);
    Vector<String> v = new Vector<String>();
   while(e.hasMoreElements())
      v.addElement(e.nextElement());
   // Converting an old-style Vector
   // to a List via an Enumeration:
    ArrayList<String> arrayList =
      Collections.list(v.elements());
    print("arrayList: " + arrayList);
  }
}