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%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
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% Most of the following are not required for the majority
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% Document Info
\author{Welten}
\pdfinfo{
  /Title (ujcs-ultimate-java.pdf)
  /Creator (Cheatography)
  /Author (Welten)
  /Subject (UJCS | Ultimate Java Cheat Sheet)
}

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\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
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    \vspace{-7pt}
    {\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{UJCS | Ultimate Java Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Welten} via \textcolor{DarkBackground}{\uline{cheatography.com/134029/cs/27565/}}}
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\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}Welten \\
  \uline{cheatography.com/welten} \\
  \end{tabulary}
\vfill
\columnbreak
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  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 7th July, 2021.\\
   Updated 12th July, 2021.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
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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
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\end{multicols}}




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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Java Data Types}}  \tn
% Row 0
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byte/short/int/long & 2\textasciicircum{} (8/ 16/ 32/ 64) \tn 
% Row Count 2 (+ 2)
% Row 1
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float {[}32bit{]} / double {[}64bit{]} & 1.0f / 1.0d, 1.0 \tn 
% Row Count 4 (+ 2)
% Row 2
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char  {[}16bit{]} & "U", "±" \tn 
% Row Count 5 (+ 1)
% Row 3
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String & "Hello World" \tn 
% Row Count 6 (+ 1)
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\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.14011 cm} x{2.83689 cm} }
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Literals}}  \tn
% Row 0
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2 ⇒ int & 2.0F ⇒ float \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
2L ⇒ long & 2.0 ; 2.0D ⇒ double \tn 
% Row Count 2 (+ 1)
% Row 2
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"u" ⇒ String & 'u' ⇒ char \tn 
% Row Count 3 (+ 1)
% Row 3
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true ⇒ boolean & false ⇒ boolean \tn 
% Row Count 4 (+ 1)
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\mymulticolumn{2}{x{5.377cm}}{number literal modifiers are case-insesitive}  \tn 
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\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Inc- / Decrement}}  \tn
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a++ & ++a \tn 
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% Row 1
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a-{}- & -{}-a \tn 
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➜ return a++ / a-{}- & ➜ return a \tn 
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\mymulticolumn{2}{x{5.377cm}}{Assignment shortcuts: x {\bf{op}}= y \newline Exp: `x += 2;`}  \tn 
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\par\addvspace{1.3em}

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\mymulticolumn{1}{x{5.377cm}}{int i = 5, j; \newline int a = 3, b = a + 1; \newline final int c; //=\textgreater{} Constant \newline c = 22; // may be init after} \tn 
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\mymulticolumn{1}{x{5.377cm}}{int{[}{]} a; //Declaration \newline a = new int{[}5{]} //Dimension \newline int{[}{]} a = new int{[}5{]}; \newline int{[}{]} b = \{10, 20, 30\}; \newline  \newline int{[}{]}{[}{]} matrix = new int{[}2{]}{[}3{]};} \tn 
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% Row 4
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% Row 7
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% Row 1
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byte, short, int & ⇒ int \tn 
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% Row 2
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% Row 3
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long & ⇒ long \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
float & ⇒ float \tn 
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% Row 5
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double & ⇒ double \tn 
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\mymulticolumn{2}{x{5.377cm}}{Examples: `byte * byte ⇒ int;  double + float ⇒ double`}  \tn 
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1. Members & () {[}{]} . \tn 
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% Row 1
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2. Multiplikation & * / \% \tn 
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% Row 2
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3. Addition & + - \tn 
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% Row 3
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4. XOR & \textasciicircum{} \tn 
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% Row 4
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5. Logical AND & \&\& \tn 
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% Row 5
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6. Logical OR & || \tn 
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\mymulticolumn{2}{x{5.377cm}}{a++, a-{}- counts as 3. Addition \newline `int a = 5, b = 8;` \newline `int c = a * b++     //c is 40;`}  \tn 
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\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Java Naming Convention}}  \tn
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\mymulticolumn{1}{x{5.377cm}}{Constants:  \newline % Row Count 1 (+ 1)
`MAX, PI, MIN\_TIME` \newline % Row Count 2 (+ 1)
Variables, Methods, Packages:  \newline % Row Count 3 (+ 1)
`xVal, int1Arr, date, showDate` \newline % Row Count 4 (+ 1)
Classes: \newline % Row Count 5 (+ 1)
`Date, DatabaseHelper`% Row Count 6 (+ 1)
} \tn 
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\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{There are other classes, but just use `BufferdReader`}  \tn 
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\begin{tabularx}{5.377cm}{X}
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\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{abstract / Interface}}  \tn
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\mymulticolumn{1}{x{5.377cm}}{abstract Method} \tn 
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\mymulticolumn{1}{x{5.377cm}}{Interface} \tn 
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\mymulticolumn{1}{x{5.377cm}}{Abstract Classes and Methods are without implementation. \newline You use `implements` for Interfaces}  \tn 
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\begin{tabularx}{5.377cm}{X}
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\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{UI}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{// Pop-Up Box: \newline import javax.swing.*; \newline String out = \seqsplit{JOptionPane.showInputDialog("Inp:} ");} \tn 
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\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Regular Expressions (Regex)}}  \tn
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\mymulticolumn{1}{x{5.377cm}}{Pattern p = Pattern.compile("\textbackslash{}\textbackslash{}w+"); \newline Matcher m = p.matcher("abc"); \newline  \newline while (m.find()) \{ \newline     m.group() \newline \} \newline  \newline //true if whole string matches \newline m.matches() -\textgreater{} bool} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\begin{tabularx}{5.377cm}{X}
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\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Bolierplate}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{//{\bf{Syntax for a standalone application in Java:}} \newline class \textless{}classname\textgreater{} \newline \{ \newline       public static void main(String args{[}{]})  \{ \newline           statements; \newline           \seqsplit{————————;} \newline           \seqsplit{————————;} \newline       \} \newline \}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Bolierplate cont.}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{Steps to run the above application:}} \newline % Row Count 1 (+ 1)
\{\{bt\}\} \newline % Row Count 2 (+ 1)
1.  Type the program in IntelliJ or notepad.  Save the file with a `.java` extension. \newline % Row Count 4 (+ 2)
2.  The file name should be the same as the class, which has the main method. \newline % Row Count 6 (+ 2)
3.  To compile the program, using javac compiler, type the following on the command line: \newline % Row Count 8 (+ 2)
{\emph{Syntax:}}  `javac \textless{}filename.java\textgreater{}` \newline % Row Count 9 (+ 1)
{\emph{Example:}}  `javac abc.java` \newline % Row Count 10 (+ 1)
4.   After compilation, run the program using the Java interpreter. \newline % Row Count 12 (+ 2)
{\emph{Syntax:}} java \textless{}filaname\textgreater{} (without the .java extension) \newline % Row Count 14 (+ 2)
{\emph{Example:}} java abc \newline % Row Count 15 (+ 1)
5.  The program output will be displayed on the command line% Row Count 17 (+ 2)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
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\begin{tabularx}{5.377cm}{X}
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\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Java Statements}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{{\bf{If Statement}} \newline if ( expression ) \{ \newline   statements \newline \} else if ( expression ) \{ \newline   statements \newline \} else \{ \newline   statements \newline \} \newline  \newline {\bf{While Loop}} \newline while ( expression ) \{ \newline   statements \newline \} \newline  \newline {\bf{Do-While Loop}} \newline do \{ \newline   statements \newline \} while ( expression ); \newline  \newline {\bf{For Loop}} \newline for ( int i = 0; i \textless{} max; ++i) \{ \newline   statements \newline \} \newline  \newline {\bf{For Each Loop}} \newline for ( vartype var : collection ) \{ \newline   statements \newline \} \newline  \newline {\bf{Switch Statement}} \newline switch ( expression ) \{ \newline   case value: \newline     statements \newline     break; \newline   case value2: \newline     statements \newline     break; \newline   default: \newline     statements \newline \} \newline  \newline {\bf{Exception Handling}} \newline try \{ \newline   statements; \newline \} catch (ExceptionType e1) \{ \newline   statements; \newline \} catch (Exception e2) \{ \newline   catch-all statements; \newline \} finally \{ \newline   statements; \newline \}} \tn 
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{IntelliJ Emmets}}  \tn
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psvm & public static void main(String{[}{]} args) \{\} \tn 
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sout & System.out.println(); \tn 
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% That's all folks
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