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static method in super class
Suppose class A has many subclasses B, C, D,... (the names can be very irregular).
Is there a way to implement a mathod
public static newInstance(String xml)
in class A such that when I say
B.newInstance(anXml), the method in A will be invoked and returns an object of type B,
while C.newInstance(aValue) will invoke the same method but returns an object of type C?
Thanks for your help
Related threads:
Re: static method in super class
Have you tried writing a simple test case and see what happens?
If you don't understand my answer, don't ignore it, ask a question.
Re: static method in super class
No. I don't know how. I used to program with ObjectC (cocoa), it's not hard doing such thing withOriginally Posted by Norm
ObjectC. And I'd like to port code to Java
I heard that I need reflection functionalities in Java to do that.
Re: static method in super class
Why are you trying to use a static method?
If you don't understand my answer, don't ignore it, ask a question.
Re: static method in super class
Because I don't assume an object of type B (C, D,...) exists. I think any method creating objects is static...
The reason I'd like to do things that way is that if I put newInstance method in each subclass, they look very similar and yet it's a big method, the resulting code will be very hard to maintain, and also ugly.
Re: static method in super class
You should do some research on static in java. Here's a page in the tutorial.I think any method creating objects is static...
Understanding Instance and Class Members (The Java™ Tutorials > Learning the Java Language > Classes and Objects)
Instances of a class are created with the new statement.
If you don't understand my answer, don't ignore it, ask a question.
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