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%\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.
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\usepackage{MnSymbol}           % Symbols
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%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{Jianmin Feng (taotao)}
\pdfinfo{
  /Title (java-exceptions-oca.pdf)
  /Creator (Cheatography)
  /Author (Jianmin Feng (taotao))
  /Subject (Java Exceptions (OCA) Cheat Sheet)
}

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% Header and Footer
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\fancyhead[L]{
\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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\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Java Exceptions (OCA) Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Jianmin Feng (taotao)} via \textcolor{DarkBackground}{\uline{cheatography.com/79308/cs/19321/}}}
\end{tabulary}
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\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
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  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}Jianmin Feng (taotao) \\
  \uline{cheatography.com/taotao} \\
  \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 1st May, 2019.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
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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*}{3}

\begin{tabularx}{5.377cm}{p{0.4977 cm} p{0.4977 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{What's exception}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Things going wrong?} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{java throwable object created and could be caught} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Message, stack trace} \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{java 7: catch \textgreater{}1 exception in one catch block} \tn 
% Row Count 4 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{0.89586 cm} x{4.08114 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Three types of Exceptions}}  \tn
% Row 0
\SetRowColor{LightBackground}
\seqsplit{checked} & JVM: hi, something wrong, you should check or declare before I allow it compiled \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\seqsplit{unchecked} & JVM: never mind, I could handle it \tn 
% Row Count 5 (+ 2)
% Row 2
\SetRowColor{LightBackground}
Error & JVM: don't try to handle it, something really really nasty happened, I will end it \tn 
% Row Count 8 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.68758 cm} x{2.28942 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Exception class inheritance}}  \tn
% Row 0
\SetRowColor{LightBackground}
java.lang.Object & super \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
java.lang.Throwable & sub class of Object \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
java.lang.Exception & sub class of Throwable \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
\seqsplit{java.lang.RuntimeException} & sub class of Exception \tn 
% Row Count 7 (+ 2)
% Row 4
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java.lang.Error & sub class of Throwable \tn 
% Row Count 9 (+ 2)
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\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Checked exceptions}}  \tn
% Row 0
\SetRowColor{LightBackground}
must be handled or declared /throws by programmer & must in try ... catch block, or throws explicitly \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
IOException & \seqsplit{FileotFoundException}, SQL, URI related exception \tn 
% Row Count 6 (+ 3)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\seqsplit{CloneNotSupportedExeption}} \tn 
% Row Count 7 (+ 1)
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\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{all java.lang.Exception and its subclass are checked exception, exception \seqsplit{java.lang.RuntimeException} and its subclass.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Unchecked exception}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\seqsplit{java.lang.RuntimeException} or its subclass} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{could handled or throws by programmer, but not required.} \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Common unchecked /runtime exceptions} \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
1 ArithmaticException & divided by 0 \tn 
% Row Count 6 (+ 2)
% Row 4
\SetRowColor{LightBackground}
2 \seqsplit{ArrayIndexOutOfBoundsException} & \seqsplit{IndexOutOfBoundsException} \tn 
% Row Count 8 (+ 2)
% Row 5
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{\seqsplit{StringIndexOutOfBoundsException}} \tn 
% Row Count 9 (+ 1)
% Row 6
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3 ClassCastException & parent-child relation \tn 
% Row Count 11 (+ 2)
% Row 7
\SetRowColor{white}
4 \seqsplit{IlegalArgumentException(app)} & \seqsplit{NumberFormatException(app} throw) \tn 
% Row Count 13 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{5 NullPointException} \tn 
% Row Count 14 (+ 1)
% Row 9
\SetRowColor{white}
6 \seqsplit{IllegalStateException} & JVM env \tn 
% Row Count 16 (+ 2)
% Row 10
\SetRowColor{LightBackground}
7 SecurityException & awt \tn 
% Row Count 17 (+ 1)
% Row 11
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{Most exception are checked due to extends Exception, not RuntimeException} \tn 
% Row Count 19 (+ 2)
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\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Compile but throw exception at runtime}  \tn 
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\par\addvspace{1.3em}

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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Java Error}}  \tn
% Row 0
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\mymulticolumn{2}{x{5.377cm}}{Should not be handled by programmer, java will terminate the program} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\seqsplit{ClassInnitializerError} & Error in Static initialization of class \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{StackOveflowError} & memory stack space used \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
\seqsplit{NoClassFoundError} & class file not found in classpath \tn 
% Row Count 8 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.4931 cm} x{3.4839 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Syntax}}  \tn
% Row 0
\SetRowColor{LightBackground}
try \{\} & \{\} required even only one statement \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
catch ()\{\} & at lease one catch or finally block required \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
muliple catch()\{\} & ordered by sub -super, or else compiler shout: never run code block found \tn 
% Row Count 7 (+ 3)
% Row 3
\SetRowColor{white}
 & at most 1 catch blocks executed \tn 
% Row Count 9 (+ 2)
% Row 4
\SetRowColor{LightBackground}
finally \{\} & always executed, exception System.exit() called before it \tn 
% Row Count 12 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{return will not prevent finally block run}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.18988 cm} x{2.78712 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Throwing an exception}}  \tn
% Row 0
\SetRowColor{LightBackground}
throws in declaration statement & throw new Exception("Error Message"); \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
nested/chained excpetions & Catch and/or finally\{\}  throws exceptions \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
exception mask & nested exceptions, the last throw win, prior throw masked \tn 
% Row Count 7 (+ 3)
% Row 3
\SetRowColor{white}
 & put try..catch in finall\{\} to avoid exception mask \tn 
% Row Count 10 (+ 3)
% Row 4
\SetRowColor{LightBackground}
calling method w/ throws & handled or throws again;required for checked exception, optional for unchecked \tn 
% Row Count 14 (+ 4)
% Row 5
\SetRowColor{white}
subclass exception & subclass of parent class exception throwed \tn 
% Row Count 16 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.64241 cm} x{3.33459 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Catch an exceptions}}  \tn
% Row 0
\SetRowColor{LightBackground}
multiple catch block & at most one executed \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
 & order sub..super, or else Never run block found error \tn 
% Row Count 5 (+ 3)
% Row 2
\SetRowColor{LightBackground}
 & the first matched block win \tn 
% Row Count 7 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{catch block may not exist} \tn 
% Row Count 8 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Print exception message}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{//print exception type and message \newline System.out.println( e); \newline //print message \newline System.out.println( e.getMessage()); \newline //print stack trace \newline e.printStackTrace(); \newline  \newline //e.getCause() \newline //e.getStackTrace()} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{do not swallow exception, should always decide what to do next at exception}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}