다형성 (Polymorphism)
상속(Inheritance)
다중상속(Multiple inheritance)
Java x
C++ o
overriding
overloading
private
protected
public
virtual
https://ko.wikipedia.org/wiki/%EA%B0%80%EC%83%81_%ED%95%A8%EC%88%98
http://marobiana.tistory.com/84
http://stackoverflow.com/questions/4547453/can-you-write-virtual-functions-methods-in-java
http://tip.daum.net/question/58306551
http://blog.eairship.kr/175
http://pacs.tistory.com/entry/C-%EC%83%81%EC%86%8D-%EB%91%90%EB%B2%88%EC%A7%B8-%EC%84%B8%EA%B0%80%EC%A7%80-%ED%98%95%ED%83%9C%EC%9D%98-%EC%83%81%EC%86%8D-private-protected-public
2. Java 관련 문법
http://misoleaf.blogspot.kr/2013/01/java.html
- Java의 기본개념 및 문법의 이해
Java 8 SE(Standard Edition) API의 범위
Java ME(Micro Edition), Java EE(Enterprise Edition), JAVA Card
기본문법
http://nyebo.net/2016/01/just-java-summary/
- Java의 Class의 기본구조 및 inner class 사용법
http://jsnote.tistory.com/21
https://www.tutorialspoint.com/java/java_innerclasses.htm
Java의 inner class 사용법
http://tworab.tistory.com/49
Java의 inner class를 이용한 캡슐화 진행
http://gangzzang.tistory.com/entry/Java-%EB%82%B4%EB%B6%80%ED%81%B4%EB%9E%98%EC%8A%A4inner-class
https://www.careercup.com/question?id=5757216146587648