[1주차] 기본 과제 & 심화 과제 제출 #3
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ddongseop
requested review from
dev-Crayon,
sookyungg,
YuSuhwa-ve and
jiyeoon00
jiyeoon00
reviewed
Apr 19, 2023
| public String bottleColor; | ||
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| public void tornado() { | ||
| System.out.println("소주는 회오리 한다음 먹어야 제맛이지! 휘이이잉!"); |
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ㅋㅋㅋㅋㅋㅋㅋㅋ저날따라 술이 먹고싶었나봐요
| String string2 = "빅맥"; | ||
| System.out.println("// 생성자를 이용하지 않으면 같은 메모리 할당 받음"); | ||
| System.out.println(System.identityHashCode(string1)); //818403870 | ||
| System.out.println(System.identityHashCode(string2)); //818403870 |
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여기서 string은 참조타입인데 왜 같은 메모리지? 하고 좀 헷갈려서 찾아보니까 자바에서는 string선언 방식이
1. new 연산자를 이용한 문자열 생성 방식
2. 문자열 리터럴 생성 방식
2개가 있군요..?! 후자에서는 String Constant Pool에 저장되고 만약 이미 존재하는 문자열이라면 같은 주소값을 공유한다고 하네요..🧐
++String Constant Pool이란❓ Heap영역 안에 위치하여 string을 별도로 관리하는 장소라고 하네유
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우와... 이건 몰랐네요! 이런 간단해보이는 코드에서도 은근 배울게 많은 것 같아요
YuSuhwa-ve
reviewed
Apr 20, 2023
| package examples; | ||
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| public abstract class Alcohol { | ||
| public int ABV; //술 도수 |
| ProtectedData protectedData = new ProtectedData(); | ||
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| public ProtectedChild() { | ||
| System.out.println("protected 접근 지정자 (자식 클래스에서): " + protectedData.data); |
| System.out.println("(오버라이딩 전) "); | ||
| food1.speak(); | ||
| System.out.println("(오버라이딩 후) "); | ||
| chicken.speak(); |
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오 이 메인메소드만 실행하면 지금까지 정리한 것들이 한번에 나오게 했네요~ 좋은것같아요
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4/18 21:08 기준 기본 과제만 완료한 상태이며, 심화 과제도 제출할 계획입니다!
4/21 17:16 기준 심화과제 (객체지향 개념을 활용한 은행 프로그램 만들기) 완료하였습니다!