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I !~  ; I  Checked ExceptionsRuntime exceptions are considered too costly to require catching It is your responsibility to ensure Runtime Exceptions will not occur You may catch Runtime Exceptions Other Exceptions are called Checked Exceptions You are required to deal with these in your codeTAg/1Ag/1Dealing With ExceptionsCatch It! try{ statements that might throw one or more exceptions } catch (SomeException e){ code to handle the exception } catch (OtherException e){ code to handle the other exception }8  ,M -+ Pass the Buck! int X()throws IOException{ statements that might throw an IOException } This makes the Exception part of the method's interface The calling method must then deal with the Exception@ImIm> " oTry, Catch, and FinallyEach try block is followed by one or more catch blocks, and an optional finally block finally{ code to be executed after the try, regardless of the try block's outcome - even if a return is executed inside the try or catch blocks! } NV V Re-Throwing an Exceptiontry{ ... }catch (Exception e){ do some things throw e; } This will cause the caught exception to be rethrown This method will need to declare that it might throw the Exception The calling method will also have to deal with it.4v4v  dwCreating Your Own ExceptionsYou will need to define your own Exception class to extent Throwable public class YourException extends Throwable{ public YourException(){ } public YourException(String s){ super(s); } //other methods??? } EZkZ ZZZDk b;     1  Throwable? class Throwable contains 4 public methods getMessage() Includes name of exception class and message stored in exception object printStackTrace() printStackTrace(PrintStream s) displays message and traceback through stack toString()v* H1- * H1-   K   Throwing Your Own Exceptionsthrow new YourException("Custom"); This is a checked exception, so it will either have to be caught, or declared in the throws clause of the method }/   ` ^WN̙f` ^WNff3` 999MMM` ^WNf` ff33` ff33` ^WN̙f>?" dd@(?zdd@ y x@" `  n?" dd@   @@``@n?" dd@  @@``PR   @ ` ` p>> 8(    C XA@C:\WINDOWS\DESKTOP\JavaBack.jpg  s *s 0`  T Click to edit Master title style! !   c $@v @  RClick to edit Master text styles Second level Third level Fourth level Fifth level!     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S  6( `P   P*    6 `   R*  H  0޽h ? ̙33@ p(      0H$ P   $ X*   0$    $ Z*   6L!$ `P  $ X*   6%$ `  $ Z* H  0޽h ? ̙33 x0( K l  C J PP   r  S K ` p    0L0 pj VDr. Tim Margush Department of Mathematics and Computer Science The University of AkronW(2WH  0޽h ? ^WNff3  X( Tt Xl X C <.$0`  $ l X C .$@ $ H X 0޽h ? ^WNff3L  \(  \l \ C X4$0`  $ l \ C 5$  $ l \ C 5$@  $ H \ 0޽h ? ^WNff3  `(  `l ` C <$0`  $ l ` C =$@ $ H ` 0޽h ? ^WNff3  l(  ll l C F$0`  $ l l C F$@ $ H l 0޽h ? ^WNff3R  d( x dl d C L$0`  $ r d S lM$  $ l d C (N$8 @ $ H d 0޽h ? ^WNff3  p(  pl p C $e$0`  $ l p C e$@ $ H p 0޽h ? ^WNff3  t(  tl t C T$0`  $ l t C Xn$@ $ H t 0޽h ? ^WNff3  x(  xl x C k$0`  $ l x C |l$@ $ H x 0޽h ? ^WNff3   ( od l  C ,0`   l  C l@  H  0޽h ? ^WNff3  |(  |l | C  $0`  $ l | C ȍ$@ $ H | 0޽h ? ^WNff30 xP( X R  3    ~  C ػ @    H  0޽h ? ̙33rP`28# -< ZS?ACGEIKMOzQ"UOh+'0`Rx8 LX x  Cup 12: Exceptions Exceptionse Tim Margush,Class notes for 3460:289 ST:Java, Fall 19987C:\Program Files\Microsoft Office\Templates\Javaxx.pot Tim Margush85 Microsoft PowerPointoso@ Fk@ hTͽ@NEGPg  R('& &&#TNPP2OMiG & TNPP &&TNPP     'A x(xKʦ """)))UUUMMMBBB999|PP3f3333f333ff3fffff3f3f̙f3333f3333333333f3333333f3f33ff3f3f3f3333f3333333f3̙33333f333ff3ffffff3f33f3ff3f3f3ffff3fffffffff3fffffff3f̙ffff3ff333f3ff33fff33f3ff̙3f3f3333f333ff3fffff̙̙3̙f̙̙̙3f̙3f3f3333f333ff3fffff3f3f̙3ffffffffff!___wwwݼݽݼݼ޼ݼݼݽݽݽݽݼݽݼݼݼݼݼݼݽ޼ݽݽݼݼݼݼݼݽݽݼݼݼݼݼݼݼݼݼݼݼݼݼݼ޼ݼݼ޼ݼݼݼݽ÷ݽݽݼݼݼݼ޼ݼݼݼݼݼݼݼ޼ݽݽޓݼݼݽݽݼñ޽ý񽷓ݼݼ޼ݽݽݼݽݽݼݽޔݼݽÓuootoݽý޽ýݼݼݽݼݼݽݼݽݽݼݼݼݼݽݼݼݼݼݽݼݼݼݼݼݼݼݼݼݼݼݽ޼ݼݼ޽ݼݼݼݽ޼ݼݽݼݼݼݼݼݽݽ޽޼޼ݼݼݼݼݽݽýݼݽ޼ݽݽݽ޼ݽݼݼݽݽݽޔtݼ޼޼ݼݼݽ޼ݼݼݼ޼ݽݽüuݼݼ޽t޼ݼݽ޼޽ݽݼݼݽ޽޼⽼ݽݽ޽ݽޓݼݽ޽ݽݼ޼ݽüݽ޼޼⽽ݽݽݽݼݼݼݼݼݽݽݽݼݼݼ޼ݼݼ޼ݽݼݼݼݼݼݼݽݼݼݼݽݼݼݼݽݽݼ㔽޼ݼ޼ݽݼݽݼݼ޼ݼݽݼݽ⽽޼ݽݽݼݼ޼޽ݽ޼޼ݼݼݽ޼ݼݼuݼݽ½ݼݼݼݼݼݼݼݼݼ޼޽ݼݼݼݼݼݽ޽޽ݼݼݼݼݼޔݽ޼ݽݼݼݼ޽ݽݽݼ޽޽޽”޽޽޽޽޽޽޽񽽽޽޽޽޽޽޽޽޼ý޽޽޽񷔓޽޽޽޽޽޽ޔ⽽޽޼޽޽޽tý޼޼޽ýý񽔓޽½޽޽޽tý޽ý㓔޽޽޽޽޽޽޽޽ý½޽޽񽽽޽޽޽޽ý޽޽޽޽޽޽޽޽ݼ½޽޽޽޽ýJJJ޽޽޽m###D#DssDJD###$#"J޽##$#*#####DK޽D*#*#$#$##"nJCD޽޽n$#$#$)E#$$#޽#*#$)$$)D#)$#޽n$#$####CDC޽J#$JW*s޽#*D1/##f7_J޽ݽ޽#E⼵sDJýtKn޽޽CsmKuMSoݽ""üJELuLuL޽nDݡnJLMMSMDݽֵff##m޽ֶֻ#"`CÒޘ޽ɯý޽޽ȧ޶iý㓽޽ý޽u--&TNPP &՜.+,D՜.+,P      On-screen ShowUniversity of Akron\ 2 Times New Roman Arial BlackTahomaMonotype SortsArial Arial NarrowJavaxxCup 12: ExceptionsWhat is an ExceptionWhat Causes an ExceptionClass HierarchyChecked ExceptionsDealing With ExceptionsTry, Catch, and FinallyRe-Throwing an ExceptionCreating Your Own Exceptions Throwable?Throwing Your Own Exceptions  Fonts UsedDesign Template Slide Titles KS[cks{  7 ? G OW_gow TemplateType GraphicType Compression ScreenSize ScreenUsage MailAddress HomePage Other DownloadOriginal DownloadIEButton UseBrowserColor BackColor TextColor LinkColor VisitedColorTransparentButton ButtonType ShowNotes NavBtnPos OutputDirFmargush@uakron.edut"http://www.cs.uakron.edu/~margushvjClass Notes for ST:Java Tim Margush Department of Mathematics and Computer Science University of Akronm   f3 C:\WINDOWS\DESKTOP\Java#_zU $Tim MargushTim Margush !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstvwxyz{|~Root EntrydO)Picturesg?Current User}SummaryInformation(KRPowerPoint Document( UDocumentSummaryInformation8uRoot EntrydO) ~Picturesg?Current UserMSummaryInformation(KR !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstvwxyz{|'_zUUniversity UserUniversity User