정복잉

package day18; import java.util.Set; import java.util.TreeSet; import java.*; public class Test11 { public static void main(String[] args) { TreeSet tsi = new TreeSet(); TreeSet tss = new TreeSet(); for(int i = 0 ; i 숫자] 반환 TreeSet tss = new TreeSet( ); tss.subSet("F","T"); = F부터 T까지의 객체를 가진것들 반환