Building A Class
This defines the class. Start with the keywords "public class," then
follow with the name of the class. The name of the class must be exactly the
same as the name of the file, case and all. Class names start with a
capital letter, and are proper-cased.
This defines a method, Start with a scope declaration, then a return type,
then the name of the method, then a pair of parentheses. Any arguments go
in the parentheses. Method names start with a lower-case, and are then
proper-cased. Method signatures are inside of the class signature.
Import statements are used to provide access to other class files. The
java.lang package classes are automatically available. Import statements
are outside of the class signature.