\documentclass[10pt,a4paper]{article}

% Packages
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\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
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\usepackage{hhline}             % Border under tables
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\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\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{Chris (cs8898)}
\pdfinfo{
  /Title (java-annotation.pdf)
  /Creator (Cheatography)
  /Author (Chris (cs8898))
  /Subject (Java Annotation Cheat Sheet)
}

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% the right line height in the tables
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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 Annotation Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Chris (cs8898)} via \textcolor{DarkBackground}{\uline{cheatography.com/130674/cs/26084/}}}
\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}Chris (cs8898) \\
  \uline{cheatography.com/cs8898} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 5th May, 2021.\\
   Updated 1st February, 2021.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
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  \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*}{2}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Define an Annotation}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{@Retention(RUNTIME) //RetentionPolicy \newline @Target(TYPE) //ElementType \newline public @interface MyAnnot \{ \newline    boolean value() default false; \newline    String name(); \newline \}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Annotation for Classes, Eums and Interfaces available for Reflection}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.52 cm} x{6.48 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{RetentionPolicy}}  \tn
% Row 0
\SetRowColor{LightBackground}
\seqsplit{`CLASS`} & Compiled into .class  No Reflection \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\seqsplit{`RUNTIME`} & Available for Reflection \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{`SOURCE`} & Only in Source Dropped for Compilation \tn 
% Row Count 6 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.72 cm} x{5.28 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{ElementType}}  \tn
% Row 0
\SetRowColor{LightBackground}
`TYPE` & Class, Interface, Enum \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
`FIELD` & Class fields \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
`METHOD` & Methods no Constructor \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
`PARAMETER` & Any Param of a Method/Constructor \tn 
% Row Count 5 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\seqsplit{`CONSTRUCTOR`} & Only Constructors \tn 
% Row Count 6 (+ 1)
% Row 5
\SetRowColor{white}
\seqsplit{`LOCAL\_VARIABLE`} & only Local Vars \tn 
% Row Count 8 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\seqsplit{`ANNOTATION\_TYPE`} & valid for other Annotations \tn 
% Row Count 10 (+ 2)
% Row 7
\SetRowColor{white}
`PACKAGE` & Annotation for Package \tn 
% Row Count 11 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{`PACKAGE` annotations should only be in `package-info.java`}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4.72 cm} x{3.28 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Extract Annotation from `Class`}}  \tn
% Row 0
\SetRowColor{LightBackground}
`getAnnotation(Class\textless{}A\textgreater{} aClass)` & in this class or from parent \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
`getDeclaredAnnotation(Class\textless{}A\textgreater{} aClass)` & only declared in this class \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
`getAnnotations()` & array of Annotations \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
\seqsplit{`getDeclaredAnnotations()`} & array of Annotations \tn 
% Row Count 8 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4.32 cm} x{3.68 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Extract Fields and Methods}}  \tn
% Row 0
\SetRowColor{LightBackground}
`get{[}Declared{]}Field(String name)` & extracts a `Field` \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
`get{[}Declared{]}Method(String name, Class\textless{}?\textgreater{}... parameterTypes)` & extracts a `Method` \tn 
% Row Count 5 (+ 3)
% Row 2
\SetRowColor{LightBackground}
`getConstructors()` & extracts an Array of `Constructor` \tn 
% Row Count 7 (+ 2)
% Row 3
\SetRowColor{white}
`get{[}Declared{]}Fields()` & extracts an Array of `Field` \tn 
% Row Count 9 (+ 2)
% Row 4
\SetRowColor{LightBackground}
`get{[}Declared{]}Methods()` & extracts an Array of `Method` \tn 
% Row Count 11 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{`getDeclared{[}...{]}(...)` always points to exactly this Object only including `private`, without `Declared` any `super` can also match but only `public` ones.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.92 cm} x{4.08 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Extract `Field` information}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{`getName()`} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{`getType()`} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{`getModifiers()`} \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
`get(Object obj)` & extract field value from `obj` \tn 
% Row Count 5 (+ 2)
% Row 4
\SetRowColor{LightBackground}
`set(Object obj, Object val)` & set field to value \tn 
% Row Count 7 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{Primitives are available e.g.: `getInt(obj)`, `setInt(obj, val)`}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4.96 cm} x{3.04 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Method Functions}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{`getName()`} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
`getParameterTypes()` & `Class` Array of Types \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{`getReturnType()`} \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
`invoke(Object obj, Object... args)` & Call Method \tn 
% Row Count 6 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.76 cm} x{4.24 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Constructors}}  \tn
% Row 0
\SetRowColor{LightBackground}
\seqsplit{`Object.class.newInstance()`} & utilizes Default Constructor of an Class object \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\seqsplit{`const.newInstance(Object....} args)` & utilizes one of the extracted Constructors \tn 
% Row Count 5 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}