I want to rethrow an exception, is that possible?

Asked by Last Modified  

12 Answers

Learn Java

Follow 1
Answer

Please enter your answer

Professional Tutor with 15 years of experience.

yes we can
Comments

Tutor

yes.We can rethrow an exception.try { // code here that throws an Exception } catch (Throwable t) { throw t; // (re)throw it in their face } Example: //Rethrowing.java // Demonstrating fillInStackTrace() public class Rethrowing { public static void first() throws Exception { System.out.println("originating...
read more
yes.We can rethrow an exception.try { // code here that throws an Exception } catch (Throwable t) { throw t; // (re)throw it in their face } Example: //Rethrowing.java // Demonstrating fillInStackTrace() public class Rethrowing { public static void first() throws Exception { System.out.println("originating the exception in first()"); throw new Exception("thrown from first()"); } public static void getexception() throws Throwable { try { first(); } catch(Exception e) { System.out.println( "Inside getexception (), e.printStackTrace()"); e.printStackTrace(); throw e; // 17 // throw e.fillInStackTrace(); // 18 } } public static void main(String[] args) throws Throwable { try { getexception (); } catch(Exception e) { System.out.println( "Caught in main, e.printStackTrace()"); e.printStackTrace(); } } } ///:~ The important line numbers are marked inside of comments. With line 17 un-commented (as shown), the output is: originating the exception in f() Inside getexception (), e.printStackTrace() java.lang.Exception: thrown from f() at Rethrowing.first(Rethrowing.java:8) at Rethrowing. getexception (Rethrowing.java:12) at Rethrowing.main(Rethrowing.java:24) Caught in main, e.printStackTrace() java.lang.Exception: thrown from f() at Rethrowing.first(Rethrowing.java:8) at Rethrowing. getexception (Rethrowing.java:12) at Rethrowing.main(Rethrowing.java:24) So the exception stack trace always remembers its true point of origin, no matter how many times it gets rethrown. With line 17 commented and line 18 un-commented, fillInStackTrace( ) is used instead, and the result is: originating the exception in f() Inside getexception (), e.printStackTrace() java.lang.Exception: thrown from first() at Rethrowing.first(Rethrowing.java:8) • at Rethrowing. getexception (Rethrowing.java:12) • at Rethrowing.main(Rethrowing.java:24) read less
Comments

A software veteran with more than decade of experience

yes...you can use catch(Exception ex) { {some logic} throw ex; }
Comments

Software Development Trainer

What do you mean by rethrow? Are you trying to ask if one can raise the exception again once it's handled in catch? If yes, then yeah we can. We need to use throw keyword. Something like this try{ //code } catch (exception ex) { //log the exception or do whatever you want. throw...
read more
What do you mean by rethrow? Are you trying to ask if one can raise the exception again once it's handled in catch? If yes, then yeah we can. We need to use throw keyword. Something like this try{ //code } catch (exception ex) { //log the exception or do whatever you want. throw ex;//rethrow exception } read less
Comments

Trainer

If you develop your own library which makes use of a third-party library that throws an exception. Now there are two options for us: 1. don't catch it (not a better option) 2. catch it and log it somewhere, then rethrow it By rethrowing, we propgate this exception to the caller (client) of your...
read more
If you develop your own library which makes use of a third-party library that throws an exception. Now there are two options for us: 1. don't catch it (not a better option) 2. catch it and log it somewhere, then rethrow it By rethrowing, we propgate this exception to the caller (client) of your library and request it to catch the excpetion. This way your delegating the responsibility of handling this excpetion to the caller of our library read less
Comments

Java Web Application Development and Aptitude Trainer

yes you can.
Comments

Java Tutor

yes...you can using catch block with appropriate Exception argument
Comments

Talent with Professional Experience

Yes you can rethrow an exception by throwing an exception inside catch block provided we are able to catch the Exception properly. If we are not sure what kind of Exception is caught; in that case we can catch the super Excepiton class incatch block and then throw any other exception
Comments

Java Technical Leader

try { } catch(Exception ex) { }
Comments

Java Technical Leader

try { // code here } catch(Exception ex) { throw ex; } but this is not advisable hust catch the same exception and re-throw it. If you want to make your application specific message then you can try this.
Comments

View 10 more Answers

Related Questions

Between Java and Python, which one is better to learn first and why?
Both the development programs come with their strong suits. While Java allows you to enjoy the cross-platform support, Python helps you execute on at least ten different operating systems. It would help...
Priyanka
0 0
5
Sir tell me some tips to code in java?
If you know C / C++ already, just try how will you able to achieve same examples in java. I prefer try to understand the fundamental of java and create small programs, then make the connectivity among them. Slowly build an application.
Nitinkumar
Is synchronized keyword necessary, in Java, if everything that is modified in a function is local to that function?
No, it is not required if you make sure whatever parameters are updated/modified will be done as atomic references/operations. Atomicity is an alternative to syncronizatiom.
Abishiek
0 0
6
How can in prepare for competitive programming in Java ? Any person or Institute who Teaches ? HELP !
If you are already a java programmer and wanted to increase your logical skills and compete somebody then you have to practice writing various logics so that you will become strong in java programming....
Ajay

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Hibernate 5
The Hibernate team published the first Hibernate 5 release quite a while ago, and since then they introduced a bunch of new features. I explained several of them here on the blog, and it’s about...
M

Mohammed Shahnawaz Akhter

2 0
0

Lambda Expressions in Java
A lambda expression, introduced in Java 8 is similar to a block of code resembling an anonymous function that can be passed to constructors or methods for execution as an argument. Examples: a)() ->...

How To Setup development Environment Of Java?
After installation of JAVA, we need to setup 2 environment variables. First one is JAVA_HOME and second is Path. Below steps to set up Java environment to compile & execute Java programs from command...

What Would Be Life Cycle Of A Fresher After Campus In An IT Company?
1. Basic Technical Training: Since freshers are not subject matter experts so gone through 3 - 6 months basic technical training within Organization. 2. Technical Assessment: HR sends freshers to various...

1.2. Find the largest element in an array.
public class Main { public static void main(String args) { int arr = {1, 2, 3, 4, 5}; int max = arr; for (int i = 1; i < arr.length; i++) { if (arr > max) { max = arr; } } System.out.println("Largest Element: " + max); }}

Recommended Articles

Designed in a flexible and user-friendly demeanor, Java is the most commonly used programming language for the creation of web applications and platform. It allows developers to “write once, run anywhere” (WORA). It is general-purpose, a high-level programming language developed by Sun Microsystem. Initially known as an...

Read full article >

Java is the most commonly used popular programming language for the creation of web applications and platform today. Integrated Cloud Applications and Platform Services Oracle says, “Java developers worldwide has over 9 million and runs approximately 3 billion mobile phones”.  Right from its first implication as java 1.0...

Read full article >

Java is the most famous programming language till date. 20 years is a big time for any programming language to survive and gain strength. Java has been proved to be one of the most reliable programming languages for networked computers. source:techcentral.com Java was developed to pertain over the Internet. Over...

Read full article >

In the domain of Information Technology, there is always a lot to learn and implement. However, some technologies have a relatively higher demand than the rest of the others. So here are some popular IT courses for the present and upcoming future: Cloud Computing Cloud Computing is a computing technique which is used...

Read full article >

Looking for Java Training Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you