D:\java FindDups2 i came i saw i left 对象集合(Set i Unique words:[came,left,saw] Duplicate words:[i] java.util.Hashs import java.util.*; D public class SetDemo2 public static void main(String args[]){ Set uniques new HashSet(); Set dups new HashSet(); for (int i=0;i<args.length;i++) if (!uniques.add(args[i])) dups.add(args[i]); uniques.removeAll(dups); System.out.println("Unique words:"uniques); System.out.printin("Duplicate words:"dups); 1010 ◼ java.util.HashSet implement java.util.Set 对象集合(Set) import java.util.*; public class SetDemo2 { public static void main(String args[]) { Set uniques = new HashSet(); Set dups = new HashSet(); for (int i=0; i<args.length; i++) if (!uniques.add(args[i])) dups.add(args[i]); uniques.removeAll(dups); System.out.println("Unique words: " + uniques); System.out.println("Duplicate words: " + dups); } } D:\java FindDups2 i came i saw i left Unique words: [came, left, saw] Duplicate words: [i] D:\