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2008-11-26 16:53:13
2008-11-26 16:53:13

* When asked in an interview or otherwise a brief answer is: "Multiple Inheritance is when a derived class inherits properties and methods from multiple classes as opposed to Single Inheritance. So, for cases where I find that I have two or more classes and another new class is to be created that has properties and behaviour of both or all the base classes then I use Multiple inheritance. For example, If base class one is Terrestrial and Base Class two is Aquatic, then the new class Amphibian will be case of multiple inheritance deriving from both the two base classes."


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The different forms of Inheritance available in Java are:Single InheritanceMultiple Inheritance andMulti level inheritance

There are many varieties of inheritance that are availableSingle InheritanceMulti-Level InheritanceMultiple Inheritance andHybrid Inheritance - A combination of one or more of the above types

Grandfather-father-child relationship is an example for multi level inheritance..

They can be specified as Single Inheritance & Multi level Inheritance. The example discussed in the previous page is Single Inheritance where the features of one class are inherited by another class. Multi level inheritance is when there are classes extending one another in a chain format. Ex: Class A extends Class B, Class B extends Class C and so on

Most of the c++ is same as Java. but the major difference is c++ supports multiple inheritance whereas java does not. java only supports single level inheritance and multilevel inheritance there is a lot of difference between multiple and multilevel inheritance

Desoola Anil Kumar, Java Faculty: There are 5 types of Inheritance. 1.Single inheritance, 2.Multiple inheritance, 3.Multilevel Inheritance, 4. Hirarichal inheritance and 5. Hybrid inheritance. Java supports multi level inheritance and hirarichal inheritance.

Multiple inheritance, as the name 'multiple' suggests, is one where more than one(multiple) super class is inherited by one sub-class. It can be represented as:A B C\ | /DOn the other hand, in case of multilevel inheritance; the superclass is inherited by a sub-class which is in turn inherited by another class leading to the different level. It can be represented as:A|B|CHowever in asp, multiple inheritance is not supported.

Inheritance is a Java feature by which we can reuse code and programming logic from one class in another class. We implement Inheritance using the extends keyword.Ex: public class Ferrari extends Car {…}Here the Ferrari Class will extend features from the Car Class.This is Inheritance. The different types of Inheritance are:Single InheritanceMulti-Level InheritanceMultiple Inheritance (Java supports only Partial Multiple Inheritance) andHybrid Inheritance

A class which inherits from more than one super-classes is said to implement multiple inheritance.For example, a simple class hierarchy might define a vehicle class. Decedents of the vehicle class could be car, ship and aeroplane classes. Another root-level class could be the class of landbound things. Using multiple inheritance, the car class might be derived from both vehicle and landbound things.

Multiple inheritance is used when a new class to be formed has to inherit characteristics from two or more classes. eg: class scientist class labourer | | | | V V -------------------------------- | class employee | -------------------------------- Multilevel inheritance is used if a derived class inherits characteristics from a base class which is a derived class (intermmediate base class). If the inheritance level is more than two then it is a multilevel inheritance. eg: class Grandfather | | V class Father | | V class son

Multiple Inheritance : we can inherit more than one class in the same class. Multi-Level Inheritance: where one class can inherit only one base class and the derived class can become base class of some other class.

There are two forms of inheritance in the Java language. The standard form of inheritance is by extension; a class declares that it extends another class, or an interface extends another interface. In this case, the sub-class or sub-interface inherits all the fields and methods of its parent. The second special form of inheritance is where classes declare that they implement an interface, which has more limited consequences. When a class implements an interface, it inherits any fields from the parent as final constants, but must provide its own implementation of the interface methods. Types of Inheritance supported by Java They can be specified as Single Inheritance & Multi level Inheritance. The example discussed in the previous page is Single Inheritance where the features of one class are inherited by another class. Multi level inheritance is when there are classes extending one another in a chain format. Ex: Class A extends Class B, Class B extends Class C and so on... There is one another form of inheritance called Multiple Inheritance. This is not supported by Java. The authors of the Java language took a design decision to compromise multiple inheritance with interfaces, the specifics of this decision may be covered in other sources. Practically, multiple inheritance is difficult because of the ambiguities it can create when a class inherits from two superclasses with the same method signature: which version should be called? But there is a workaround for this problem. Java allows us to achieve partial multiple inheritance using interfaces. A class can implement any number of interfaces and provide implementations for them and achieve partial multiple inheritance. in simple words java supports simple, hierarchial, multi level and hybrid inheritance but at the same time java also supports multiple inheritance with the help of interfaces.

Single inheritance, multiple inheritance, multi-level inheritance and virtual inheritance. Single inheritance is where a derived class inherits directly from one base class. Multiple inheritance is where a derived class inherits directly from two or more base classes. Multi-level inheritance is where a derived class inherits directly from another derived class. Virtual inheritance is commonly used in multiple, multi-level inheritance, where two or more base classes inherit from the same common base class. The most-derive class then indirectly inherits multiple instances of that common base class, which introduces an ambiguity. By declaring the common base class virtual in the other base classes, the most-derived class directly inherits one instance of the common base class and the base classes then share the same instance of the common base class rather than their own separate instances.

Interfaces have only methods declared and not defined. So that these various methods can be altered or customized or written according to the need. Hence Multiple inheritance is implemented through Interfaces.Interface is a progam which just declares various methods or functions, so that any user can write the contents of that method declaration.AnswerTrue Multiple Inheritance refers to the ability to inherit from multiple CLASSES. Thus, a true multiple inheritance language does not use interfaces. However, many single-inheritance languages provide most of the benefits of the multiple inheritance concept by using interfaces (Java, for example). The problem with true Multiple Inheritance is twofold:(a) at the compiler and runtime level, it is often difficult to determine which method is being referred to, as M.I. can lead to very convoluted (and sometimes conflicting) namespaces(b) there is no specific superclass, which can lead to problems with determining relationships between classesUsing a S.I. model with interfaces avoids these two problems.

Single, multiple, multi-level, hierarchical and hybrid/virtual inheritance. Single inheritance applies when one class inherits from just one base class. Multiple inheritance applies when one class inherits from two or more base classes. Multi-level inheritance applies to a class that inherits from at least one base class that is itself derived from another base class. Hierarchical inheritance applies to a base class that is inherited by two or more separate derived classes. Hybrid inheritance combines multiple inheritance, multi-level inheritance and hierarchical inheritance. That is, where A is a common base class of derived classes B and C, and B and C are both base classes of derived class D. Hybrid inheritance is often used with virtual inheritance where B and C inherit from A virtually rather than directly. In these cases, the virtual base class is instantiated by the most-derived class in the hierarchy, D, and this instance is then shared by both B and C.

single level inheritance eg ( class B extends Class A) Multilevel inheritance eg( class C extends class B and class B extends class A) multiple inheritance Class C inherits Class A features as well as Class B featues.This type of inheritance is not allowed in JAVA.

There are 4 types of inheritence:1. Single2. Multiple3. Multi-Level4. Heirchy

PHP Supports Multi Level Inheritance

Java does not support the ability for one class to extend more than one other class. However, Java does allow for one class to implement any number of interfaces.Let us consider the below example for hybrid inheritance.public class A extends C implements D, E {}Here A extends C which is direct single inheritance, By implementing D & E we are trying to achieve multiple inheritance to the limit that Java allows us. And if C in turn has extended some other class then we have multi level inheritance as well.This can be termed as Hybrid inheritance. The presence of more than one form of inheritance.

A level 3 question is when you have an important topic and you explain. Example: Describe what the united states looks like?

1. Single InheritanceA Scenario where one class is inheriting/extending the behavior of just one super class.Ex: public class Ferrari extends Car {…}This can be taken much further, where one class is inheriting/extending the bahavior of another class which in turn is inheriting behavior from yet another class.Ex: public class Automobile {…}Public class Car extends Automobile {…}Public class Ferrari extends Car {…}This multi-level inheritance actually has no limitations on the number of levels it can go. So as far as Java goes, it is limitless. But for maintenance and ease of use sakes it is better to keep the inheritance levels to a single digit number.2. Multiple InheritanceThis type of inheritance allows for a class to inherit from more than one superclass. That is, a child class can have more than one parent.Ex.public class ArmoredCar extends Car, TankAs with single inheritance, there can be many levels of multiple inheritance.Unfortunately, multiple inheritance is much more complicated to properly implement than single inheritance, due to what is known as namespace collision. For instance, what if both the Car and the Tank classes above have a method Drive(). Which superclass method does ArmoredCar use, if it doesn't explicitly specify its own Drive() method? If it wants to extend one, how does it do that? In the context of the ArmoredCar class, what does the super() method refer to? Languages which attempt to allow multiple inheritance run into a large number of these problems, which require either compiler or language workarounds, making them both more verbose and more complex than languages which allow only single inheritance.Do note that languages which support multiple inheritance do not require its use - programs in such languages can solely use single inheritance. In general, most OO languages suggest using multiple inheritance where very substantial savings in code and/or design logic can be realized over a single inheritance design.Java does not support Multiple Inheritance. C++ is a common language which does allow Multiple Inheritance.

polygenic inheritance is when more than one genes are responsible for a character/phenotype. for example human skin color. if one want to draw a pedigree for that, he will not be able to succeed. although individual genes at molecular level is inherited according to mendel's laws. and mendelian inheritance simply follows mendels laws. also the character is controlled by one gene only. for example pea plant height.

Yes. It is possible to implement overriding in every inheritance level. If there are methods of the same name in multiple classes in the hierarchy the one that is closest to the current object gets invoked. The other methods can be specifically invoked using the super keyword.

Multiple inheritance:The concept of Getting the properties from multiple class objects to sub class object with same priorities is known as multiple inheritance.Java Doesn't Support multiple Inheritance.Diamond problem: In multiple inheritance there is every chance of multiple properties of multiple objects with the same name available to the sub class object with same priorities leads for the ambiguity.We have two classes B and c which are inheriting A class properties.Here Class D inheriting B class and C class So properties present in those classes will be available in java.But both classes are in same level with same priority.If we want to use show() method that leads to ambiguityThis is called diamond problem.Because of multiple inheritance there is chance of the root object getting created more than once.Always the root object i.e object of object class hast to be created only once.Because of above mentioned reasons multiple inheritance would not be supported by java.Thus in java a class can not extend more than one class simultaneously. At most a class can extend only one class.Inheritance means getting the properties from one class object to another class object.Means if any class extending another class then the super class methods can be used in sub classes happily.But in interfaces the methods in interfaces are fully abstract so we need to provide functionlity in our extended class and use it .seems both are opposite right? yes.That is the reason we can say interfaces are only supports syntactical multiple inheritance which is not implementation of multiple inheritance.source:

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