Users do not need to write constructors for every class . A constructor can be declared using any of the access modifiers. It is mandatory to have a constructor with the right access modifier. However, the compiler supplies a default if an access modifier is not defined in the class and a constructor is not declared.
Read moreIs it mandatory to use constructor in a class C++?
Answer: C++ Empty constructor necessity depends upon class design requirements . We know that C++ class constructor is called when we create an object of a class. If a class is not required to initialize its data member or does not contain data member, there is no need to write empty constructor explicitly.10 Eki 2016
Read moreDoes all Java class need a constructor?
All classes have constructors by default : if you do not create a class constructor yourself, Java creates one for you. However, then you are not able to set initial values for object attributes.
Read moreWhat if a class has no constructor Java?
Java does not actually require an explicit constructor in the class description. If you do not include a constructor, then the Java compiler will create a default constructor with an empty argument .11 Ağu 2016
Read moreCan I have class without constructor?
Answer: Yes, C# class without constructor is possible . In fact, we can have a class without any constructor in C#. If we don’t declare any constructors in a class, the compiler automatically provides a public parameter less constructor. And it is ok to instantiate the class without constructor.
Read moreShould all Java classes have a constructor?
Java doesn’t require a constructor when we create a class . However, it’s important to know what happens under the hood when no constructors are explicitly defined. The compiler automatically provides a public no-argument constructor for any class without constructors. This is called the default constructor.2 Eki 2017
Read moreDoes every class have a constructor?
Every class has a constructor whether it’s a normal class or a abstract class . Constructors are not methods and they don’t have any return type. Constructor name should match with class name . Constructor can use any access specifier, they can be declared as private also.
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