\documentclass[10pt,a4paper]{article}

% Packages
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\usepackage{multicol}           % Allows multicols in tables
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\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{Edgar (edgarjoel21)}
\pdfinfo{
  /Title (java-fundies-2.pdf)
  /Creator (Cheatography)
  /Author (Edgar (edgarjoel21))
  /Subject (Java Fundies 2 Cheat Sheet)
}

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% This two commands together give roughly
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% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
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% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Java Fundies 2 Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Edgar (edgarjoel21)} via \textcolor{DarkBackground}{\uline{cheatography.com/44289/cs/13117/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}Edgar (edgarjoel21) \\
  \uline{cheatography.com/edgarjoel21} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 12th October, 2017.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{4}

\begin{tabularx}{3.833cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{Contains (CartPt)}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{`  public boolean contains(CartPt pt) \{     return (this.nw.x \textless{}= pt.x) \&\& (pt.x \textless{}= this.nw.x + this.size) \&\&            (this.nw.y \textless{}= pt.y) \&\& (pt.y \textless{}= this.nw.y + this.size);   \} \}`} \tn 
% Row Count 4 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{This occurs when we have CartPt nw as a field}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{x{2.0598 cm} x{1.3732 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{String Methods}}  \tn
% Row 0
\SetRowColor{LightBackground}
s.length() & s.charAt(/) \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
s.substring(start, end) & s.toUpperCase() \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
s.toLowerCase() & s.indexOf(x) \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
s.replace(old, new) & s.split(regex) \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
s.trim() & s.equals(s2) \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
s.compareTo(s2) (Compares two strings Lexiographically) & \seqsplit{s.contains(CharSequence} cs) \tn 
% Row Count 8 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{p{0.50027 cm} x{0.81623 cm} p{0.50027 cm} x{0.81623 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{4}{x{3.833cm}}{\bf\textcolor{white}{Arithmetic Operators}}  \tn
% Row 0
\SetRowColor{LightBackground}
x + y & add & x - y & subtract \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
x * y & Multiply & x/y & divide \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
x \% y & modulo &  &  \tn 
% Row Count 3 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}----}
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\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{p{2.30011 cm} p{1.13289 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{Boolean Operators}}  \tn
% Row 0
\SetRowColor{LightBackground}
! x & not \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
x \&\& y & and \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
x || y & or \tn 
% Row Count 3 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{Abstracted Sameness}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{`abstract class AFoo implements IFoo \{   public boolean sameX(X that) \{ return false; \}   public boolean sameY(Y that) \{ return false; \}   public boolean sameZ(Z that) \{ return false; \} \} class X extends AFoo \{   public boolean sameFoo(IFoo that) \{ return that.sameX(this); \}   public boolean sameX(X that) \{ ... compares two X values ... \} \} class Y extends AFoo \{   public boolean sameFoo(IFoo that) \{ return that.sameY(this); \}   public boolean sameY(Y that) \{ ... compares two Y values ... \} \} class Z extends AFoo \{   public boolean sameFoo(IFoo that) \{ return that.sameZ(this); \}   public boolean sameZ(Z that) \{ ... compares two Z values ... \} \}`} \tn 
% Row Count 14 (+ 14)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{p{0.34229 cm} p{0.71091 cm} p{0.34229 cm} x{1.23751 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{4}{x{3.833cm}}{\bf\textcolor{white}{Comparisons}}  \tn
% Row 0
\SetRowColor{LightBackground}
x \textless{} y & less & x \textless{}= y & less than or equal \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
x \textgreater{} y & greater than & x \textgreater{}= y & greater than or equal \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
x == y & Equal & ! x & Not equal \tn 
% Row Count 6 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}----}
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\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{Distance formula (Origin)}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{`  public double distanceToOrigin() \{     return Math.sqrt(this.x {\emph{ this.x + this.y }} this.y) - this.radius;   \} \}`} \tn 
% Row Count 3 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{` - this.radius ` is only for circle}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{DistanceTo Formula}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{`class CartPt \{   ...   double distanceTo(CartPt that) \{     return Math.sqrt(       (this.x - that.x) {\emph{ (this.x - that.x)       + (this.y - that.y) }} (this.y - that.y));   \} \}`} \tn 
% Row Count 4 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{x{2.64341 cm} p{0.78959 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{Insert()}}  \tn
% Row 0
\SetRowColor{LightBackground}
`public ILoBook insert(Book b) \{   if \seqsplit{(this.first.cheaperThan(b))} \{     return new ConsLoBook(this.first, this.rest.insert(b));   \}   else \{     return new ConsLoBook(b, this);   \} \}` & \seqsplit{ConsLoBook()} \tn 
% Row Count 7 (+ 7)
% Row 1
\SetRowColor{white}
`public ILoBook insert(Book b) \{   return new ConsLoBook(b, this); \}` & \seqsplit{MtLoBook()} \tn 
% Row Count 10 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{x{1.7165 cm} x{1.7165 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{append(ILoItem other)}}  \tn
% Row 0
\SetRowColor{LightBackground}
`public ILoItem allNumbers() \{ return \seqsplit{this.left.allNumbers().append(this.right.allNumbers());} \}` & `// In interface-{}- ILoItem append(ILoItem other);` \tn 
% Row Count 5 (+ 5)
% Row 1
\SetRowColor{white}
`// in consLoItem -{}- public ILoItem append(ILoItem other) \{ new \seqsplit{ConsLoItem(this.first}, \seqsplit{this.rest.append(other));} \}` & `// MtLoItem -{}-{}- public ILoItem append(ILoItem other) \{ return other; \}` \tn 
% Row Count 11 (+ 6)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{p{0.34229 cm} x{1.76411 cm} p{0.2633 cm} p{0.2633 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{4}{x{3.833cm}}{\bf\textcolor{white}{Younger IAT (In IAT)}}  \tn
% Row 0
\SetRowColor{LightBackground}
In IAT & `IAT youngerIAT(IAT other); -{}-{}-{}-{}-{}-{}- IAT youngerIATHelp(IAT other, int otherYob);` &  &  \tn 
% Row Count 4 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}----}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{Younger IAT and Helper}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{`public IAT youngerIAT(IAT other) \{return \seqsplit{other.youngerIATHelp(this}, this.yob);`} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{3.833cm}}{`IAT youngerIATHelp(IAT other, int otherYob) \{  if (this.yob \textgreater{} otherYob) \{         return this;     \}     else \{         return other;     \} \}`} \tn 
% Row Count 5 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{Youngest Parent}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{`public IAT youngestParent() \{     return \seqsplit{this.mom.youngerIAT(this.dad);} \}`} \tn 
% Row Count 2 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{Youngest GrandParent}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{`public IAT youngestGrandparent() \{ return \seqsplit{this.mom.youngestParent().youngerIAT(this.dad.youngestParent());} \}`} \tn 
% Row Count 3 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{Abstract Interface}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{`abstract class AShape implements IShape \{   CartPt loc;   String color;     AShape(CartPt loc, String color) \{     this.loc = loc;     this.color = color;   \} \}`} \tn 
% Row Count 4 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{p{0.3433 cm} p{0.3433 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{Abstract Class}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{3.833cm}}{`class Circle extends AShape \{   int radius;     Circle(CartPt center, int radius, String color) \{     super(center, color);     this.radius = radius;   \} \}  `} \tn 
% Row Count 4 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{Subclass entension}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{`class Square extends Rect \{     Square(CartPt nw, int size, String color) \{     super(nw, size, size, color);   \}`} \tn 
% Row Count 3 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{size, size represent length and width. \newline You would need to override the method to use size rather than length/width}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{x{1.7165 cm} x{1.7165 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{Tips}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Don't:}} & {\bf{Do:}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Casting & Design Recipe \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Field of Field & Tests: test helpers \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
isFoo() (isEmpty()) & Purpose statements \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Getters & Shorthand \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
 & Dynamic Dispatch \tn 
% Row Count 6 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{Abstract with Range in constructor}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{`interface ITetrisPiece \{   int SCREEN\_HEIGHT = 30; \} `} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{3.833cm}}{`abstract class ATetrisPiece implements ITetrisPiece \{   ...   ATetrisPiece(int x, int y) \{     this.xPos = x;     this.yPos = y;   \}   ATetrisPiece(int x) \{     this(x, SCREEN\_HEIGHT);   \} \}`} \tn 
% Row Count 6 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{Utilis Class}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{`class Utils \{   int checkRange(int val, int min, int max, String msg) \{     if (val \textgreater{}= min \&\& val \textless{}= max) \{       return val;     \}     else \{       throw new \seqsplit{IllegalArgumentException(msg);}     \}   \} \}`} \tn 
% Row Count 5 (+ 5)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{This allows a constructor to be general}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{Illegal Exception Message in Constructor}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{`// In class Date -{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-{}-Date(int year, int month, int day) \{   this.year = new Utils().checkRange(year, 1500, 2100,     "Invalid year: " + Integer.toString(year));   this.month = new Utils().checkRange(month, 1, 12,     "Invalid month " + \seqsplit{Integer.toString(month));}   this.day = new Utils().checkRange(day, 1, 31,     "Invalid day: " + Integer.toString(day));`} \tn 
% Row Count 8 (+ 8)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{\seqsplit{`integer.toString(year))`} changes the invalid integer to a string and combines (+)}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{3.833cm}}{\bf\textcolor{white}{Testing Exceptions}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{3.833cm}}{`// In Tester -{}-{}-{}- boolean \seqsplit{checkConstructorException(Exception} e,                                     String className,                                     ... constr args ...);`} \tn 
% Row Count 4 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{x{1.7165 cm} x{1.7165 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{Sameness Interface}}  \tn
% Row 0
\SetRowColor{LightBackground}
`interface IShape \{   boolean sameShape(IShape that);   boolean sameCircle(Circle that);   boolean sameRect(Rect that);   boolean sameSquare(Square that); \}` & `// In Circle: public boolean sameShape(IShape that) \{   return \seqsplit{that.sameCircle(this);} \}` \tn 
% Row Count 8 (+ 8)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{3.833cm}}{Others would be false in this class}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}