Notes

• An abstract class hides the implementation? An abstract class implements an interface?

move answeered and unanswered questions from DiagonalDifference to this wiki

what is a superclass

research the different types of streams

create an explainer or cheatsheet for Oracle's Javadoc style including All Implemented Interfaces: Direct Known Subclasses: https://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html

what is a "Field Detail" as in System.in https://docs.oracle.com/javase/7/docs/api/java/lang/System.html

what is extends vs implements with regards to abstract classes, interface, and implementations