import java.util.HashSet; import java.util.Scanner; //去重 public class E { public static void main(String[] args) { Scanner cin = new Scanner(System.in); HashSet<String> set = new HashSet<>(); String str = cin.nextLine(); String arr[] = str.split(" "); for (int i = 0; i < arr.length; i++) { set.add(arr[i]); } System.out.println(set.size());//输出有几种不一样的字符串 } }
输入
qwe q e we we we qwe we e e qwe
输出
4