- What is the difference between constructor and destructor?
- Why return type is not allowed for constructor?
- Can we declare constructor as private?
- Does constructor return any value in C++?
- Can a constructor throw an exception?
- Is a constructor a void method?
- Can constructor be overloaded?
- What is constructor and its types?
- Why do we need constructor?
- What happens if we add return type to constructor?
- Can constructor have return type in C++?
- What type of constructor Cannot have a return type?
What is the difference between constructor and destructor?
Constructor helps to initialize the object of a class.
Whereas destructor is used to destroy the instances..
Why return type is not allowed for constructor?
So the reason the constructor doesn’t return a value is because it’s not called directly by your code, it’s called by the memory allocation and object initialization code in the runtime. Its return value (if it actually has one when compiled down to machine code) is opaque to the user – therefore, you can’t specify it.
Can we declare constructor as private?
Yes, we can declare a constructor as private. If we declare a constructor as private we are not able to create an object of a class. We can use this private constructor in the Singleton Design Pattern.
Does constructor return any value in C++?
Constructors are functions that do not return a value. The family of functions that do not return a value consists of: void functions, constructors and destructors. It is stated in 6.6. 3/2 in the C++ standard.
Can a constructor throw an exception?
Yes, constructors are allowed to throw an exception in Java. A Constructor is a special type of a method that is used to initialize the object and it is used to create an object of a class using the new keyword, where an object is also known as an Instance of a class.
Is a constructor a void method?
Because constructor function returns the object it creates, not Void.
Can constructor be overloaded?
Yes! Java supports constructor overloading. In constructor loading, we create multiple constructors with the same name but with different parameters types or with different no of parameters.
What is constructor and its types?
A constructor is a special type of function with no return type. Name of constructor should be same as the name of the class. We define a method inside the class and constructor is also defined inside a class. A constructor is called automatically when we create an object of a class.
Why do we need constructor?
The purpose of constructor is to initialize the object of a class while the purpose of a method is to perform a task by executing java code. Constructors cannot be abstract, final, static and synchronised while methods can be. Constructors do not have return types while methods do.
What happens if we add return type to constructor?
Since constructor can only return the object to class, it’s implicitly done by java runtime and we are not supposed to add a return type to it. If we add a return type to a constructor, then it will become a method of the class. This is the way java runtime distinguish between a normal method and a constructor.
Can constructor have return type in C++?
1) Constructor doesn’t have a return type. Member function has a return type. 2) Constructor is automatically called when we create the object of the class. Member function needs to be called explicitly using object of class.
What type of constructor Cannot have a return type?
implicit return typeThe implicit return type by default is the class type in which it is declared. No. A constructor can not return a value because a constructor completely replaces the reference ID of an object, and as a constructor is also a method and a method can’t return more than one values.