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Frequently Asked Questions

Do I need to call super() in the constructor of a class that extends an abstract class?

Java FAQ
No. Since abstract classes don't have constructors it would be a syntax error to call super(). Just implement the constructor of the subclass as if it does not have a parent class.

Is a C# interface the same as a C++ abstract class?

Andy Mc's C# FAQ for C++ programmers
No, not quite. An abstract class in C++ cannot be instantiated, but it can (and often does) contain implementation code and/or data members. A C# interface cannot contain any implementation code or data members - it is simply a group of method names & signatures. A C# interface is more like a COM interface than a C++ abstract class. See similar questions...

What is the difference between abstract class and interface?

Java FAQ - Page 7
Latest Answer: hi, Diff b/w abstract class and interface are.. Abstract class can have concrete me... Latest Answer: See the base class(super class) of all classes is Object class.Other wise when u creat a class ,and ... See similar questions...

Can I call the constructor of the base class?

Frequently asked question about the Scriptol interpreter and...
I inherit the class Car of the class Vehicle, for example. Can I call the constructor of Vehicle, from the constructor of Car? I do that in Java. Java has the "super" keyword to call the constructor of a class from the constructor of an inherited class. There is no equivalent in Scriptol. If you call the constructor of the base class, this create a new instance of the base class. But you can assign the attributes of the base class from the constructor of the inherited class. See similar questions...

Do I need my own computer to take the class?

EDMT 628 - FAQ
You will need a computer with an Internet connection to take the class. You can run the browser test (see question above) to make sure your computer will work with the EMU course software. If yours works, you can access the class and read the assignments. If not, you will need to find a computer that will do this. It is your responsibility to be able to do the work. See similar questions...

What is a constructor?

snitfaq - Snit's Not Incr Tcl, OO system
In object-oriented programming, an object's constructor is responsible for initializing the object completely at creation time. The constructor receives the list of options passed to the snit::type command's create method and can then do whatever it likes. That might include computing instance variable values, reading data from files, creating other objects, updating type and instance variables, and so forth. See similar questions...

How do I call the constructor?

FAQ
The Polynomial(int d, double *coefs) constructor is invoked when an object of type Polynomial is defined using the appropriate arguments. For example, double co[] = { 1.2, 3.4, 5.6 }; Polynomial p(2, co); constructs p to represent 5.6x2 + 3.4 x + 1.2. See similar questions...

What is Super Saturday? Do I need to register for two classes or can I just take one?

Frequently Asked Questions (FAQ) About The Children's Health...
Super Saturday is a free event held twice a year at CHEC that provides participants an opportunity to attend two sessions regarding a variety of topics in parenting and caregiving. The event begins with a light breakfast along with a chance to win free door prizes. Each participant chooses a class from each of the two tracks. The first session begins at 9 a.m. and the second session begins at 10:45. Continuing education credits are provided for these classes. See similar questions...

What are the differences between an interface and an abstract class?

Java Programmer's FAQ
The principal difference is that an abstract class is used when you have a type/subtype relationship. An interface does not imply a type/subtype hierarchy; it merely forces a class to have some methods with a given signature. That allows some other code to rely on being able to call those methods. You want to subclass abstract classes when you are making subtypes that define the abstract behavior. The subclass should have a "kind of" relationship to the superclass. See similar questions...

What is an abstract and why do you need it so early?

Boston University - College of Engineering
An abstract is a brief synopsis of your research project (200 words or less). The abstract form and abstract must be submitted on time in order to allow our reviewers ample time to review, score and return them to the regional office. See similar questions...

I need to make corrections to my abstract. How do I do that?

Annual Meeting > ESA/SER Joint Meeting 2007
Corrections are not possible after June 1. However, if you need to make corrections before that date, you may do so by going to the Abstract Submission site and entering the user id and password you received with your initial submission. In order to not be charged the Late Cancellation Fee, you must cancel your presentation before the May 1, 2007 deadline OR arrange for someone else to present your presentation. See similar questions...

What is an abstract value?

Larch Frequently Asked Questions
abstract value is a mathematical abstraction of some bits that might exist in your computer. (It's an abstraction in the same sense that a road map of the United States is an abstraction of the geography and roads of the United States.) In a Larch BISL's model of your computer, each variable contains an abstract value. See similar questions...

Will you make this class super easy?

History 370: FAQ
Well, when I was a student, the easiest classes were the ones I enjoyed, and so lectures/essays did not really feel like "work." I'll do my best to make the class like that. If you mean that you just want me to hand out A grades like candy, that's not going to happen. See similar questions...

how can you invoke parameterized constructor to create object from class reference?

Java FAQ - Page 9
Latest Answer: Here is the snap shot of the working solution to the said question..try{System.out.println("cl... Latest Answer: Synchronized is used to synchronize an OBJECT. So, answer to this is false since we can use it for a... See similar questions...

How to handle C++ class constructor overloading and polymorphism in Ch?

Frequently Asked Questions for Ch
The example above demonstrates how to overload functions in Ch. For handling C++ constructors with polymorphism, please check Ch User's Guide sections about Variable Number Arguments in Functions and Polymorphism for member functions and contructors. See similar questions...

If subclass overrides the methods in super class, can subclass call the super class method?

JavaChina, SCJP Questions & Answers by Roseanne Zhang (3...
Yes, you can. However, that is the subclass it self's choice. Outsider does not have this choice. You can see it clearly from the following example. class Sup { void m1() { System.out.println("m1 in super"); } } class Sub extends Sup{ void m1() { super.m1(); System.out.println("m1 in sub"); } } public class T{ public static void main(String arg[]) { new Sub().m1(); } } See similar questions...

abstract class may not be declared as final.176. What is the ResourceBundle class?

JAVA interview questions
The ResourceBundle class is used to store locale-specific resources that can be loaded by a program to tailor the program's appearance to the particular locale in which it is being run. The exception propagates up to the next higher level try-catch statement (if any) or results in the program's termination. See similar questions...

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