import java.util.*;class Solution { public ArrayList solution(int n, int k) { ArrayList answer = new ArrayList(); for(int i=1;i

Iterator는 컬렉션 프레임워크(List, Set, Map, Queue ... )에서 값을 가져오거나 삭제할 때 사용    Iterator iterator명 = 컬렉션.iterator();  Iterator.hasNext()다음 값이 있는지 확인있으면 true, 없으면 false  Iterator.next()다음 값 가져오기  Iterator.remove()next()로 가져온 값을 삭제할 때 사용  public static void main(String[] args) { ArrayList list = new ArrayList(); list.add(1); list.add(2); list.add(3); Iterator Ilist = list.iterator(); whil..

https://docs.aws.amazon.com/corretto/latest/corretto-21-ug/downloads-list.html Downloads for Amazon Corretto 21 - Amazon Corretto 21Thanks for letting us know this page needs work. We're sorry we let you down. If you've got a moment, please tell us how we can make the documentation better.docs.aws.amazon.com    https://github.com/spring-projects/sts4/wiki/Previous-Versions Previous VersionsThe n..

SELECT to_number(to_char(start_date,'mm')) as MONTH, CAR_ID, count(*) as RECORDSfrom CAR_RENTAL_COMPANY_RENTAL_HISTORY where to_char(start_date,'yyyy-mm-dd') between '2022-08-01' and '2022-10-31' group by to_char(start_date,'mm'), car_idhaving car_id in (select car_id from CAR_RENTAL_COMPANY_RENTAL_HISTORY where to_char(start_date,'yyyy-mm-dd') between '2..