subclass 2 « subclass « Java Class Q&A

1.	abstract class
2.	Base class
3.	class hierarchy
4.	class name
5.	class version
6.	Class.forName
7.	ClassCastException
8.	Clone
9.	constant
10.	Constructor
11.	Development
12.	DTO
13.	encapsulation
14.	equal method
15.	extend Class
16.	getter
17.	hashcode
18.	Inheritance
19.	inner class
20.	interface
21.	main class
22.	Method
23.	NoClassDefFoundError
24.	NoSuchMethodError
25.	NoSuchMethodException
26.	object reference
27.	overload
28.	parent class
29.	Polymorphism
30.	private
31.	Private Field
32.	Recursive
33.	setter
34.	Static
35.	Static Class
36.	subclass
37.	Super
38.	toString
39.	Wrapper Class

Java Class Q&A » subclass » subclass 2

1. Getting the name of a subclass? forums.oracle.com

I'm writing this program for my computer science class and I was wondering if you guys could help me. I have a superclass called Person, with two subclasses, Student and FacutlyStaff. In my driver class, I have an array of Person objects. I need to print out each class types toString() method separately. For example, if the user chooses 1, I ...

2. Subclassing java.util.logging.LogManager forums.oracle.com

i am trying to subclass the LogManager class and have tried adding the following System property as mentioned in the Java API :- java.util.logging.manager = CustomLogger where, CustomLogger is the name of my subclass of LogManager. Still, when I ran the program, the instance of the global log manager (java.util.logging.LogManager) is only created. It's not creating the instance of "CustomLogger". I ...

3. is a class is subclass of itself? forums.oracle.com

The words subclass and superclass were inspired from subset and superset in mathematics. In mathematics, a set is both a subset and a superset (but neither a strict subset or a strict superset) of itself. Seen in this context, it makes sense to decide to consider a class a subclass of itself. But it's a battle about words, of course.

4. How do get the subclasses of Class forums.oracle.com

You can't You could examine the classpath for any classes that extend a particular class, but that's a major pain in the backside to do, and isn't really guaranteed to work anyway. But a class is not aware of it's subclasses, there's no simple "getSubclasses" method or anything to be had Why d'you think you need this, anyway?

5. Changing return value to a subclass a downward compatibility hazard? forums.oracle.com

We are writing some 'framework' code that is deployed as jar-files and used by several client applications. I have a factory class with a static method createSomething() that returns an instance of class Something. I want to change that method to return a SometingMoreSpecial. SomethingMoreSpecial is a subclass of Something. May this cause downward compatibility problems for the client applications? Will ...

6. How to call dispose() on subclass forums.oracle.com

Thanks for the responses. My understanding (which is very slight!) is that it needs to be an inner class so that it can implement ActionListener, which allows it to be added as a listener to a button. I've tried to follow the pattern of having an inner class (implementing ActionListener) for each button in my GUI - thus avoiding the scenario ...

7. Class.forName().newInstance(): InstantiationException for subclass forums.oracle.com

8. Problems wiht Images class and its subclasses forums.oracle.com

ow whats the matter with that one, maybe the other ones will be solved with myself. So, the getScaledIntance is returning Image, but how its possible becouse Image itself is abstract. It returns a reference of type Image to an object of type "whatever", with whatever extending Image. variable "k" is an instance from BufferedImage Variable k is nothing but a ...