Java Data Type - 如何从字符串中删除重复行

import java.util.HashSet;
import java.util.Set;

public class Main {
  public static void main(String[] args) {
    String input = "E,E,A,B,C,B,D,C";

    Set<String> set = new HashSet<String>();

    for (String s : input.split(","))
      set.add(s);

    for (String s : set)
      System.out.println(s);
  }
}