1 //仅供参考
 2 
 3 import java.util.HashSet;
 4 import java.util.Scanner;
 5 import java.util.Set;
 6 
 7 public class Guest {
 8 
 9     public static void main(String[] args) {
10         // TODO Auto-generated method stub
11 
12         Scanner sc=new Scanner(System.in);
13         System.out.println("输入英文单词(空格隔开)：");
14         
15         String line=sc.nextLine();
16         String[] tokens=line.split(" ");
17         
18         Set<String> words=new HashSet<String>();
19         for(String token:tokens)
20         {
21             words.add(token);
22         }
23         System.out.println("不重复的单词个数有"+words.size()+"个！"+words);
24         
25         sc.close();
26     }
27 }