제출 #191714

실행 실패 (제출 코드 컴파일 에러)

Main.java:7: error: incompatible types: cannot infer type arguments for HashMap<>
	static HashMap<Integer, List<Wood>>[] woods = new HashMap<>();
	                                                         ^
    reason: no instance(s) of type variable(s) K,V exist so that HashMap<K,V> conforms to HashMap<Integer,List<Wood>>[]
  where K,V are type-variables:
    K extends Object declared in class HashMap
    V extends Object declared in class HashMap
Main.java:23: error: cannot find symbol
			List<Wood> list = woods.getOrDefault(y, new ArrayList<>());
			                       ^
  symbol:   method getOrDefault(int,ArrayList<Object>)
  location: variable woods of type HashMap<Integer,List<Wood>>[]
Main.java:25: error: cannot find symbol
			woods.put(y, list);
			     ^
  symbol:   method put(int,List<Wood>)
  location: variable woods of type HashMap<Integer,List<Wood>>[]
Main.java:28: error: cannot find symbol
		List<Integer> yList = new ArrayList<>(woods.keySet());
		                                           ^
  symbol:   method keySet()
  location: variable woods of type HashMap<Integer,List<Wood>>[]
Main.java:32: error: cannot find symbol
			List<Wood> list1 = woods.get(yList.get(i));
			                        ^
  symbol:   method get(Integer)
  location: variable woods of type HashMap<Integer,List<Wood>>[]
Main.java:34: error: cannot find symbol
				List<Wood> list2 = woods.get(yList.get(j));
				                        ^
  symbol:   method get(Integer)
  location: variable woods of type HashMap<Integer,List<Wood>>[]
6 errors