Java Comparable, Comparator Interface (2)

	//Compatator 예제

	class Friend {
		String name;
		int height;
		int weight;
		
		public Friend(String name, int height, int weight){
			this.name = name;
			this.height = height;
			this.weight = weight;
		}
		
		public String getName() {
			return name;
		}

		public void setName(String name) {
			this.name = name;
		}

		public int getHeight() {
			return height;
		}

		public void setHeight(int height) {
			this.height = height;
		}

		public int getWeight() {
			return weight;
		}

		public void setWeight(int weight) {
			this.weight = weight;
		}

	}

//	이전 키를 기준으로 내림차순 정렬

//	 class MyComparator implements Comparator<Friend>{
//		@Override
//		public int compare(Friend f1, Friend f2) {
//
//			if(f1.getHeight() > f2.getHeight() )
//				return 1;
//			else if(f1.getHeight() < f2.getHeight() )
//				return -1;
//			else
//				return 0;
//		}
//		
//	} 

	//	수정 (키를 기준으로 오름차순 정렬하되, 키가 같으면 몸무게로 내림차순 정렬)

	class MyComparator implements Comparator<Friend>{	
		@Override
		public int compare(Friend f1, Friend f2) {
			// TODO Auto-generated method stub
			if(f1.getHeight() > f2.getHeight() )
				return 1;
			else if(f1.getHeight() < f2.getHeight() )
				return -1;
			else{
				if(f1.getWeight() < f2.getWeight() )
					return 1;
				else if(f1.getWeight() > f2.getWeight() )
					return -1;
				else
					return 0;
			}
		}
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		List<Friend> friends = new ArrayList<>(); 
		friends.add(new Friend("김동*", 184, 77));
		friends.add(new Friend("민상*", 190, 70));
		friends.add(new Friend("강성*", 200, 72));
		friends.add(new Friend("장재*", 200, 80));
		
		Collections.sort(friends, new MyComparator());
		
		int size = friends.size();
		for(int i = 0; i < size ; i++){
			System.out.print(friends.get(i).name + " "); 
		}
	}