썸네일: oneook
#[상속](<https://soooh.notion.site/f17c9819ad39474a813eb56df37e80f3>)
#하위클래스의생성순서
#상위클래스생성자호출
#[super](<https://soooh.notion.site/super-super-e5486fb465e144f38cc3ce6b00b4b080>)
#[protected](<https://soooh.notion.site/f17c9819ad39474a813eb56df37e80f3>)
#[overriding](<https://soooh.notion.site/37fb12fd7a9e4d9e991084eba631e466>)
#업캐스팅(upcasting)
#[묵시적형변환](<https://soooh.notion.site/37fb12fd7a9e4d9e991084eba631e466>)
#상속에서의상위클래스와하위클래스의메모리상태
#가상메서드
#[다형성](<https://soooh.notion.site/polymorphism-b3b6d2277bec4d3c9b90416641c31745>)(polymorphism)
#다운캐스팅
#instanceof
#명시적형변환