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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

I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
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
How can I make nanorobot?
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