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java.lang.AbstractMethodError

apoorba mohapatra
Greenhorn

Joined: Mar 28, 2005
Posts: 7
Can anyone explain java.lang.AbstractMethodError with example?
Srinivasa Raghavan
Ranch Hand

Joined: Sep 28, 2004
Posts: 1228
This type of error is thrown when a application tries to call a abstract method. Once I got this type of error when i changed the signature of bean and redeployed it the app server. It got solved after undeploying the existing bean & deploying the new version instead of redeploying directly.


Thanks & regards, Srini
MCP, SCJP-1.4, NCFM (Financial Markets), Oracle 9i - SQL ( 1Z0-007 ), ITIL Certified
marc weber
Sheriff

Joined: Aug 31, 2004
Posts: 11343

http://java.sun.com/j2se/1.4.2/docs/api/java/lang/AbstractMethodError.html


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apoorba mohapatra
Greenhorn

Joined: Mar 28, 2005
Posts: 7
I have gone through that link earlier, but I want example, so that I can understand it properly.
thanks
Jeroen Wenting
Ranch Hand

Joined: Oct 12, 2000
Posts: 5093
I've only ever encountered it once when I had changed an abstract class but forgotten to deploy the changed version of a derived class to the web application.
The derived class misses a method that is called so the call is relegated to the mother class in which it is abstract and thus can never be called.


42
Thomas Paul
mister krabs
Ranch Hand

Joined: May 05, 2000
Posts: 13974
You would have to compile the class file in a development environment where the class you are calling is not abstract and then move to a production environment where the called class is abstract.


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subject: java.lang.AbstractMethodError