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Tip: Catching to Log in Java

See why it is important to pass all required information along in the exception.




Building the Right Environment to Support AI, Machine Learning and Deep Learning

The code below catches the exception to write out a log statement and then re-throws the same exception. It is recommended to let the caller decide if the message should be logged and remove the whole try/catch clause.

This is the case if the method is called by a framework that is not under your control. If you log because the caller doesn't have enough information to log, then your exception class is inappropriate. It is important to pass all required information along in the exception.

try {
} catch (Exception1 e){
  log.error(e.getMessage(), e);
  throw e; 
} catch (Exception2 e){
  log.error(e.getMessage(), e);
  throw e; 


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Octavia Andreea Anghel is a senior PHP developer currently working as a primary trainer for programming teams that participate at national and international software-development contests. She consults on developing educational projects at a national level. She is a coauthor of the book "XML Technologies--XML in Java" (Albastra, ISBN 978-973-650-210-1), for which she wrote the XML portions. In addition to PHP and XML, she's interested in software architecture, web services, UML, and high-performance unit tests.
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