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2008-07-07 06:06:05
2008-07-07 06:06:05

Overloading constructor means when you have multiple constructors in a class but with different number of arguments.

We cannot override a constructor, but we can override a method having same arguments and same return type. This means when I subclass a particular class then I can call the superclass's class method and override that with subclass's own logic.


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really there is no difference between constructor overloading and metho overloading

The only similarity is that both constructor and function overloads are distinguished by their signature -- the number and type of their arguments. Functions differ in that they also have a return type, which is also part of the signature, whereas constructors have no return type, not even void.

Constructor is called when the object is created. Destructor is called when the object is destroyed

An implicit constructor call will always call the default constructor, whereas explicit constructor calls allow to chose the best constructor and passing of arguments into the constructor.

Constructor construct assign the value of class object while destructor delete or free memory which is allocated by constructor.

* A constructor is called when you want to create a new instance of a class. A destructor is called when you want to free up the memory of an object (when you delete it). * A constructor constructs the value of an object . A destructor destructs the value created by the constructor for the object. * Another differentiation is their syntax's : constructor : (Arguments){//body of constructor.} destructor : ~() { }The basic difference between constructor and destructor is constructor is called during the beginning of the program whereas the destructor is called at the end of the program.The former allocates memory whereas the later removes the memory.The constructor can be overloaded however the destructor cannot be overloaded.

While overloading operators using member function it takes only one arguments(other pass implicitly)... but in case of friend fuction two parameters are required..

Function overloading is multiple definition with different signatures(the parameters should be different) for the same function. The parameter list have to be different in each definition. The compiler will not accept if the return type alone is changed. Operator overloading is defining a function for a particular operator. The operator loading function can not be overloaded through function overloading.

JavaThere is really no such thing as a static constructor in Java. The closest thing that comes to mind is a factory class, which calls a private constructor when a static method is called.class A {// This private constructor can't be called by any other class.private A() {}// Here is your "static" constructorpublic static A getInstance() {return new A();}}

A constructor is called during the creation of an instance of that class and it does not have a return type as a member function. It is not a property of the created object and the constructor can not be accessed by the object. It is like a static method that only gets called during object creation.

Function overloading refers to using the same function name in the same scope with multiple versions depending on the parameters provided. Operator overloading is a specialized version of function overloading, and refers specifically to using operators instead of function names. These are usually designated with the keyword "operator". Function overloading: void doSomething(int arg1); void doSomething(int arg1, int arg2); Operator overloading: obj& operator +(obj arg1, obj arg2);

overriding means you're changing an already existing method. overloading means you're using the same method name, but you use different parameters in each one.

A class is simply the definition of a data type. A constructor is a special method of a class that is automatically invoked whenever an object of that type is instantiated, and is used to initialise the object's data members.

Assuming you mean Java: A constructor is very similar to a "normal" method, in that it is a place to type commands. The main differences is that a constructor is invoked automatically every time an object of the specified class is instantiated. With respect to syntax, there are two differences: (1) The constructor must have the same name as the class (including upper- and lowercase), and (2) The constructor has no declared return value, not even void.

Runtime prolymorphism means overriding compiletile polymorphism means overloading

Constructor will be automatically invoked when an object is created whereas method has to be called explicitly. Constructor needs to have the same name as that of the class whereas functions need not be the same. * There is no return type given in a constructor signature (header). The value is this object itself so there is no need to indicate a return value. * There is no return statement in the body of the constructor. * The first line of a constructor must either be a call on another constructor in the same class (using this), or a call on the superclass constructor (using super). If the first line is neither of these, the compiler automatically inserts a call to the parameterless super class constructor.

A constructor is a special method that has the same name as the class name, and it cannot be invoked or called like a method call, it must be invoked by the new operator. For example, new Object();

A default constructor is one that has no parameters (C++ also calls constructors with all default parameters a default constructor), while a parameterized constructor is one that has at least one parameter without a default value. Default constructors can be provided by the compiler if no other constructors are defined for that class or any class the class inherits from, while parameterized constructors must always be defined by the developer.

A constructor is a method that fires when the object is instantiated. A friend function is a function that has special access to the object. They are two different types of things, and cannot be further differenced.

Explicit means done by the programmer. Implicit means done by the JVM or the tool , not the Programmer. For Example: Java will provide us default constructor implicitly.Even if the programmer didn't write code for constructor, he can call default constructor. Explicit is opposite to this , ie. programmer has to write .

when initializing a class elements by using constructor it will assigned to the elements when object creation is going on. by using other ways the elements will be initialize with default values when object creation

The constructor is a method that runs to initialize the instance of the class. It runs right after memory allocation. The destructor is a method that runs to deinitialize the instance of the class. If runs right before memory deallocation.

Constructor creates an instance of class, destructor destroys it.

Every class has at least one it's ownconstructort. Constructor creates a instance for the class. Constructor initiates (initialize) something related to the class's methods. Constructor is the method which name is same to the class. But there are many difference between the method (function) and the Constructor. In this example we will see that how to to implement the constructor feature in a class. This program is using two classes. First class is another and second is the main class which name is Construct. In theConstruct class two objects (a and b) are created by using the overloaded another Constructor by passing different arguments and calculated the are of the different rectangle by passing different values for the another constructor.

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