第274页 其中CustomComparator这个类应为 package Collection.Sort;import java.util.Comparator;public class CustomComparator implements Comparator ...{ public int compare(Object o1, Object o2) ...{ String s1=(String)o1; String s2=(String)o2; if(s1.equals(s2))...{ return 0; } else if(s1.compareTo(s2)>0)...{ return -1; } else...{ return 1; } }} s1.compareTo(s2)>0而非 s1.compareTo(s2)==1