Null Pointer Exception Error's in WebDynpro Java

[Former Member]

Hi All,

How Types are coming Null Pointer Exception Error's in WebDynpro Java, Please provide the types.of Errors.

Ex. Cardinality Type not correct etc...

Thanks,

Bye,

Vijay Hari.

[Former Member]

Hi Vijay,

Generally Null pointer exception will occur when trying to perform some opearation on any object which does not exist, i mean object is not instantiated .

Try to use try& catch block and print exception on screen.

try{

..........

}catch(Exception e){

wdComponentAPI.getMessageManager().reportSuccess("Exception"+e.getMessage());

}

Thanks.

Veeru

[Former Member]

HI

Null Pointer Exception can occur in may instances , for suppose

1) when you create a Value Node with some attribute which has cardinality , and you have not

initialized the Node , then it would through Null Pointer exception ,

2) when you integrate the RFC and parameters you pass as input to the RFC are not set correctly

then there could be null pointer when you execute the RFC

3>or may be when you doesnot bind the node when using webservice then there could be null pointer exception

and there could be many occurances for the exception

[Former Member]

Hi,

In webdynpro java code null pointer exceptions are thrown for the same reason as in any java class. I dont think it will be easy for anyone tell all types of excetions. Following is the javadocs link you can try searching in that

http://help.sap.com/javadocs/NW04S/SPS09/wd/com/sap/tc/webdynpro/progmodel/api/package-summary.html