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Figure 12 . Output from the exception handler.
In exception handler, get the message 3

When the catch block finishes execution ...

When the code in the catch block has completed execution, control is transferred to the first executable statement following the catch block as shown in Listing 9 .

Listing 9 . Code following the catch block.
System.out.println( "Out of catch block");}//end main }//end class Excep16

That executable statement is a print statement that produces the output shown in Figure 13 .

Figure 13 . Output from code following the catch block.
Out of catch block

Complete program listing

A complete listing of the program named Excep16 is shown in Listing 10 .

Listing 10 . Complete program listing for Excep16 .
/*File Excep16.java Copyright 2002, R. G. BaldwinIllustrates defining, throwing, catching, and processing a customexception object that contains a message.Tested using JDK 1.4.0 under Win 2000 The output is:Processing data for cnt = 0 Processing data for cnt = 1Processing data for cnt = 2 In exception handler, get the message3 Out of catch block**************************************/ //The following class is used to// construct a customized exception // object containing a messageclass MyException extends Exception{ MyException(String message){//constrsuper(message); }//end constructor}//end MyException class //===================================//class Excep16{//controlling class public static void main(String[] args){try{ for(int cnt = 0; cnt<5; cnt++){ //Throw a custom exception, and// pass message when cnt == 3 if(cnt == 3) thrownew MyException("3"); //Transfer control before// processing for cnt == 3 System.out.println("Processing data for cnt = " + cnt);}//end for-loop }//end try blockcatch(MyException e){ System.out.println("In exception handler, " + "get the message\n"+ e.getMessage()); }//end catch block//-------------------------------// System.out.println("Out of catch block"); }//end main


This module has covered many of the details having to do with exception handling in Java. By now, you should know that the use of exception handling isnot optional in Java, and you should have a pretty good idea how to use exception handling in a beneficial way.

Along the way, the discussion has included the following topics:

  • What is an exception?
  • How do you throw and catch exceptions?
  • What do you do with an exception once you have caught it?
  • How do you make use of the exception class hierarchy provided by the Java development environment?

What's next?

That concludes the "Essence of OOP" portion of the ITSE 2321 sub-collection. The series is continued in the ITSE 2317 sub-collection.


This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Java OOP: Exception Handling
  • File: Java1630.htm
  • Published: 09/03/02

Financial : Although the Connexions site makes it possible for you to download a PDF file for thismodule at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, you should beaware that some of the HTML elements in this module may not translate well into PDF.

I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version of the module.

In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale on Amazon.com showing me as the author. Ineither receive compensation for those sales nor do I know who does receive compensation. If you purchase such a book, please beaware that it is a copy of a module that is freely available on cnx.org and that it was made and published withoutmy prior knowledge.

Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.


Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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