How to design coffee vending machine in java

Brijendra

• Sep 23rd, 2012

1) Inheritance is the concept where the child class can concentrate on new features that it want. because all the basic features it will get it from its parent class.

2) It is about re-usability of features.

manisha chandani

 Profile Answers by manisha chandani Questions by manisha chandani

• Aug 24th, 2012

Helps in reusability of code.
Program development time is reduced.
Helps as security purpose.

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manisha chandani

 Profile Answers by manisha chandani Questions by manisha chandani

• Aug 24th, 2012

Abstract class is a class which contains atleast one abstract method.
Abstract method-method whose body is not defined.
Object of abstract class cannot be created.

vijin

• Apr 9th, 2012

Abstract class is a base class. It is only declare a method and implement this method in a derived class using the override method.
it is declare a abstract keyword, and no need for create object for abstract class.

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Difference between dispose()and close() method

mohammad imran

• Jun 28th, 2012

The basic difference b/w close() & dispose() method is , when a close() method is called , any manage resource can be close temporarily and can e opened once again. It means that, with the same objec...

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Sandhya.Kishan

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• Jun 13th, 2012

It is a class which provide an interface for creating families of related objects.It encapsulate the logic which helps to decide which subclass should be instantiated and hence removes this decision f...

00elton00

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• Aug 5th, 2007

A Factory class is one that is used to return instances of other classes. This is generally used in the context of Factory Design Pattern.

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Sandhya.Kishan

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• Jun 13th, 2012

Object-oriented languages include Simula, Smalltalk, C++, Eiffel, Python, Ruby, C# and REALbasic other than Vb and java script.

harpreet sran

• Nov 15th, 2007

Other object oriented languages are c++ & simula 67

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Each C++ object possesses the 4 member fns, what are those 4 member functions.please tell me what i s the answer for this question.

Sandhya.Kishan

 Profile Answers by Sandhya.Kishan Questions by Sandhya.Kishan

• Jun 13th, 2012

Each C++ object has constructor,default constructor,copy constructor and destructor as the member functions.

ABC

• Aug 24th, 2011

Following are four default functions available for each object
1) constructor
2) destructor
3) copy constructor
4) assignment operator

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How can you make a class as interface, if you cannot add any Pure Virtual Function?

Sandhya.Kishan

 Profile Answers by Sandhya.Kishan Questions by Sandhya.Kishan

• Jun 13th, 2012

By putting a virtual destructor inside an interface makes a class an interface.

sangeeta

• Feb 21st, 2012

Add pure virtual destructor in that class

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prabhjot kaur

• May 12th, 2012

Encapsulation is the wrapping up of data members and data functions into a single unit like classes. here we can control the visibility of data with the help of access specifiers i.e. public,private and protected.
in data hiding data is totally private we cannot access the data.

shrimanta

• Mar 15th, 2012

Encapsulation is the concept of the datamember. Data Hiding is the Access Specifier.

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Sandhya.Kishan

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• Mar 10th, 2012

Access modifier are used to implement encapsulation feature of oops.There are 3 access specifiers namely Private: The current class will have access to the field or method. Protected - The current cl...

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Sandhya.Kishan

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• Mar 10th, 2012

Data model is an abstract model which describes the representation and usage of data.In oops context data are modeled as units of objects and data model represents the logical organization of real wor...

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Sandhya.Kishan

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• Mar 10th, 2012

In round robin algorithm time slices are assigned to each process in equal portions and in circular order, handling all processes without priority. Round-robin scheduling is simple, easy to implement,...

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What is sigbus error

Sandhya.Kishan

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• Mar 10th, 2012

When a bus error occurs a signal is sent to the processor called as sigbus signal.The constant for sigbus is defined in header file signal.h.Sigbus error is thrown when there is improper memory handling.

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gowtham

• Feb 28th, 2012

Creating a new classes from exiting classes 5 type

ruchika arora

 Profile Answers by ruchika arora Questions by ruchika arora

• Feb 27th, 2012

There are 5 types of inheritance: -1. Single inheritance2. Multilevel inheritance3. Multiple inheritance4. Hierarchical inheritance5. Hybrid inheritance

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Praveen

• Jan 17th, 2012

No, it is not possible. One of the reasons is stated below.

In inheritance, if we create an object to child class, the base class constructor is by default called in derived class constructor as the first statement. Since there is cyclic dependency it will go into infinite loop.

shivaramag

 Profile Answers by shivaramag Questions by shivaramag

• Aug 4th, 2011

No it is not possible. compile time error is thrown

Circular base class dependency involving 'x' and 'y'

x & y are classes derived from each other.

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ProgrmmingBOT

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• Nov 21st, 2011

We cannot inherit private members of a class,but you can use friend functions to access private data

sean

• Oct 10th, 2011

If you can declare the sub class in the base class (i.e if you make sub class as inner class in base class), you will be able to access the private members of the base class.

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Why we use static destructor? What is its scope and What is its implementation?

• Nov 7th, 2011

You cannot declare destructor as static.
Destructors cannot be declared const, volatile, const volatile or static.

Refer:
http://publib.boulder.ibm.com/infocenter/comphelp/v8v101/index.jsp?topic=%2Fcom.ibm.xlcpp8a.doc%2Flanguage%2Fref%2Fcplr380.htm

static ~Sample()
{
std::cout

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Anand Kumar

• Oct 31st, 2011

Patterns: . A common Solution to a common problem in a context.A solution to narrowly-scoped technical problem. i.e. A fragment of solution or a piece of the puzzle.... Framework: Defines the gene...

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Ayushi Gupta

• Oct 15th, 2011

Using gets we can enter the entire string

raja_k450

 Profile Answers by raja_k450 Questions by raja_k450

• Mar 19th, 2008

 there is no way to process an entire string.it has to be done char by char

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