[프로그래머스]JAVA 프린터 -스택/큐

참고 : 처음에 초기값 생성 잘못해서 밑에 배열 삭제 할때 엄청 해맴

링크 : https://school.programmers.co.kr/learn/courses/30/lessons/42587

프로그래머스

import java.util.*;
import java.util.stream.Collectors;

class Solution {
    public int solution(int[] priorities, int location) {
        int answer = 0;
        
        //초기 배열 세팅
        List<Documents> documents = new ArrayList<>();
        for (int i =0; i< priorities.length ; i++) {
            documents.add(new Documents(i,priorities[i]));
        }

        // 3, 2, 2, 1 로 순번 생성
        List<Integer> collect = Arrays.stream(priorities)
                .boxed()
                .sorted(Comparator.reverseOrder())
                .collect(Collectors.toList());

        List<Documents> results = new ArrayList<>();
    
        //순번 루프
        for (Integer priority : collect) {
            //작업 배열 순회
            while(!documents.isEmpty()){
                Iterator<Documents> it2 = documents.iterator();
                Documents doc = it2.next();
                it2.remove();
                //조건 미충족 시 피드백
                if(doc.getPriority() != priority){
                    documents.add(doc);
                }else{
                    results.add(doc);
                    break;
                }
            }
        }

        for(int i=0; i<results.size(); i++){
            if(results.get(i).getIndex() == location) answer = i+1;
        }
        
        return answer;
    }
    
        public class Documents{
        int index;
        int priority;

        public Documents(int index, int priority) {
            this.index = index;
            this.priority = priority;
        }
        public Documents(Documents other){
            this.index = other.getIndex();
            this.priority = other.getPriority();
        }
        public int getIndex() {
            return index;
        }

        public int getPriority() {
            return priority;
        }

        @Override
        public String toString() {
            return "{" +
                    "index=" + index +
                    ", priority=" + priority +
                    '}';
        }
    }
}