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% Document Info
\author{scottstoll2017 (ScottHOC)}
\pdfinfo{
  /Title (comparing-kotlin-and-java.pdf)
  /Creator (Cheatography)
  /Author (scottstoll2017 (ScottHOC))
  /Subject (Comparing Kotlin and Java Cheat Sheet)
}

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\noindent
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    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
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\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Comparing Kotlin and Java Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{scottstoll2017 (ScottHOC)} via \textcolor{DarkBackground}{\uline{cheatography.com/45425/cs/13376/}}}
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  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}scottstoll2017 (ScottHOC) \\
  \uline{cheatography.com/scotthoc} \\
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 2nd November, 2017.\\
   Page {\thepage} of \pageref{LastPage}.
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  Measure your website readability!\\
  www.readability-score.com
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\begin{document}
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\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Kotlin}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Semiocolons NOT needed. If you use them,the compiler will give you a gray notice they're redundant.} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Null safety. Using `null` is strongly discouraged.} \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Variables can be typed upon declaration or not. The compiler will infer a type from how you use it if you don't specify. {\emph{It's good practice to type your variables on declaraion if you know what it will be.}} Use 'T' if not (more later).} \tn 
% Row Count 8 (+ 5)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Values and Variables}}  \tn
% Row 0
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\mymulticolumn{1}{x{8.4cm}}{It's good practice to specify a type on declaration but you don't have to.} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Typing is accomplished by adding a colon and the type after the new variable's name:\{\{nl\}\} `var newInt : Int = 4`\{\{nl\}\} `var newString : String = "Send Lawyers, Guns and Money."`} \tn 
% Row Count 6 (+ 4)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Don't feel like declaring a type? No problem. The compiler will take a best guess based on how you initialize it:\{\{nl\}\} `var newString = "More lawyers... and definitely more money."`\{\{nl\}\} `var moreMoney = 10000`} \tn 
% Row Count 11 (+ 5)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{val is a Value that never changes. Your name is a val and the voting age (18) is another. Vals have lower overhead because you initialize it once and that's it.\{\{nl\}\}`val name = "John Doe"` // Name never changes\{\{nl\}\}`val votingAge = 18`~~~~ // Voting age doesn't change.} \tn 
% Row Count 17 (+ 6)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{var is a Variable that can change as needed. Your age is a var . Vars have more overhead than Vals because of the additional code associated with being able to manipulate their contents.\{\{nl\}\} `var age = 22` // 22 today, but 23 next year.\{\{nl\}\}`var side = "Garlic Mashed Potatoes"` // Will it be salad tomorrow?} \tn 
% Row Count 24 (+ 7)
% Row 5
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\mymulticolumn{1}{x{8.4cm}}{{\bf{NULL note:}}\{\{nl\}\} Unlike Java you {\emph{normally}} can't declare a variable without initializing it because to do so would mean that the variable has a null value. It's strongly suggested to initialize it upon declaration, even if you use "" or 0 to do it. However, if you're determined to make your variable null then you can do so by declaring it's type and then putting a '?' at the end of the type like this:\{\{nl\}\}`var missingString : String?`\{\{nl\}\}`var missingInt : Int?`} \tn 
% Row Count 34 (+ 10)
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\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Java}}  \tn
% Row 0
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\mymulticolumn{1}{x{8.4cm}}{Semicolons are required at the end of statments.} \tn 
% Row Count 1 (+ 1)
% Row 1
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\mymulticolumn{1}{x{8.4cm}}{You can blow yourself up with all the `nulls` you want. The compiler won't stop you.} \tn 
% Row Count 3 (+ 2)
% Row 2
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\mymulticolumn{1}{x{8.4cm}}{Variables are typed on declaration.} \tn 
% Row Count 4 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{If Statements}}  \tn
% Row 0
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\mymulticolumn{1}{x{8.4cm}}{`if ( hungry) \{`\{\{nl\}\} `~~~~~eat();`\{\{nl\}\} `\} else if ( thirsty) \{`\{\{nl\}\} `~~~~~drink();`\{\{nl\}\} `\} else \{`\{\{nl\}\} `~~~~~doThatOtherThing();`\{\{nl\}\} `\}`} \tn 
% Row Count 6 (+ 6)
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\begin{tabularx}{8.4cm}{X}
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% Row 0
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\mymulticolumn{1}{x{8.4cm}}{Checks for `true` BEFORE doing the action. If `false` the code never executes at all:\{\{nl\}\}`while (shallWeDoThis) \{`\{\{nl\}\} `~~~~~executeThisCode();`\{\{nl\}\} `~~~~~thisCodeToo();`\{\{nl\}\} `~~~~~\}`} \tn 
% Row Count 6 (+ 6)
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Do While Loop}}  \tn
% Row 0
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\mymulticolumn{1}{x{8.4cm}}{Checks for `true` AFTER doing the action. If `false` then the action is done once before the condition is even checked. Notice the unusual syntax at the end, with parens and a ; rather than braces.\{\{nl\}\}`do \{`\{\{nl\}\} `~~~~~theThingToDo`\{\{nl\}\} `~~~~~\} while (shallWeDoItAgain);`} \tn 
% Row Count 7 (+ 7)
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{For Loop}}  \tn
% Row 0
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\mymulticolumn{1}{x{8.4cm}}{Ye old for loop that hasn't changed since the Pharos coded in the pyramids.\{\{nl\}\} `for ( int i = 0; i \textless{} max; ++i) \{`\{\{nl\}\} `~~~~~theThingToDoEachTimeWeLoop();`\{\{nl\}\} `\}`} \tn 
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Switch in Java = When in Kotlin}}  \tn
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\mymulticolumn{1}{x{8.4cm}}{Switch Statement\{\{nl\}\} `switch( thing1IsEqualTo ) \{\{\{nl\}\}`  `~~~~~case thing2:\{\{nl\}\}` `~~~~~~~~~~doThing2Stuff\{\{nl\}\}` `~~~~~~~~~~break;\{\{nl\}\}` `~~~~~case thing3:\{\{nl\}\}` `~~~~~~~~~~doThing3Stuff\{\{nl\}\}` `~~~~~~~~~~break;\{\{nl\}\}` `~~~~~default:\{\{nl\}\}` `~~~~~~~~~~doDefaultStuff\{\{nl\}\}` `\}\{\{nl\}\}`} \tn 
% Row Count 15 (+ 15)
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Try / Catch}}  \tn
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\mymulticolumn{1}{x{8.4cm}}{`try \{\{\{nl\}\}` `~~~~~statements;\{\{nl\}\}` `\} catch (ExceptionType e1) \{\{\{nl\}\}` `~~~~~statements;\{\{nl\}\}` `catch (Exception e2) \{\{\{nl\}\}` `~~~~~catch-all statements;\{\{nl\}\}` `\} finally \{\{\{nl\}\}` `~~~~~statements;\{\{nl\}\}` `\}\{\{nl\}\}`} \tn 
% Row Count 8 (+ 8)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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% That's all folks
\end{multicols*}

\end{document}