CSC300 / CSC402: Natural Order [4/7]

Natural order String is dictionary order

• String implements java.lang.Comparable

  public interface Comparable<T> {
    int compareTo(T that);
  }
  

  • return negative if this<that
  • return positive if this>that
  • return zero if this==that

External order specified by CardComparator

• CardComparator implements java.util.Comparator

  public interface Comparator<T> {
    int compareTo(T o1, T o2);
  }
  

  • return negative if o1<o2
  • return positive if o1>o2
  • return zero if o1==o2