package pk;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

public class Test {

	public static void main(String[] args) {
		Set<String> s = new HashSet<>() ;
		s.add("abc"); s.add("54c"); s.add("zsd");
		s.add("yx3"); s.add("abcd"); s.add("fds");
		s.add("543"); s.add("a1c"); s.add("bdef");
		
		Iterator<String> it = s.iterator();
		System.out.print("기존 데이터 : ");
		while(it.hasNext()) {
			System.out.print(it.next() + " ");
		}
		
		
		List<String> list = new ArrayList<>(s);
		
		Collections.sort(list);
		System.out.print("\n오름차순 : ");
		for(String a : list) System.out.print(a + " ");
		
		System.out.print("\n내림차순 : ");
		Collections.sort(list, Collections.reverseOrder());
		for(String a : list) System.out.print(a + " ");
	}

}