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Necessary to initialize bean properties?

 
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For any java file, is it necessary to initialize the bean properties, for example



or there is no need for that. just this below will do?




can someone clarify my problem for me. thanks alot
 
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No, you do not need to initialize your properties but according to the "JavaBeans" guidelines "JavaBeans" must have a no-arg constructor. This is not a compiler requirement but is required by tools/frameworks (e.g. Hibernate, Castor XML, ...) which need to make instances of your classes using reflection.

If you want to init your properties you could use "chained constructor":


which looks nicer and is easier to maintain (you only need to init the properties in one constructor, validation (e.g. checking for null) can be put in one place and so on.


pascal
 
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Bean properties are basically class level private variables.If you do not initialize then it would take the default.I use bean only as data carrier and no logic in that.I leave the variables as it is.
 
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