gistfile1.txt

NullPointerException: http://stackoverflow.com/questions/218384/what-is-a-null-pointer-exception-and-how-do-i-fix-it
ArrayIndexOutOfBoundsException: http://stackoverflow.com/questions/5554734/what-causes-a-java-lang-arrayindexoutofboundsexception-and-how-do-i-prevent-it
raw types: http://stackoverflow.com/questions/2770321/what-is-a-raw-type-and-why-shouldnt-we-use-it
string <-> date: http://stackoverflow.com/questions/4216745/java-string-to-date-conversion
Generics polymorphic: http://stackoverflow.com/questions/2745265/is-listdog-a-subclass-of-listanimal-why-arent-javas-generics-implicitly-p
split string: http://stackoverflow.com/questions/3481828/how-to-split-a-string-in-java
nextXXX not consuming: http://stackoverflow.com/questions/13102045/skipping-nextline-after-using-next-nextint-or-other-nextfoo-methods
Class of generic type: http://stackoverflow.com/questions/182636/how-to-determine-the-class-of-a-generic-type
static method: http://stackoverflow.com/questions/290884/what-is-the-reason-behind-non-static-method-cannot-be-referenced-from-a-static