Can A Class Have Both Default Constructor And Parameterized Constructor?

Can we have a constructor with all default arguments?

Like all functions, a constructor can have default arguments.

They are used to initialize member objects.

Note that if a constructor has any arguments that do not have default values, it is not a default constructor.

The following example defines a class with one constructor and two default constructors..

Can a constructor be static?

A static constructor does not take access modifiers or have parameters. A class or struct can only have one static constructor. Static constructors cannot be inherited or overloaded. A static constructor cannot be called directly and is only meant to be called by the common language runtime (CLR).

Can constructor throw 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.

How do you call a parameterized constructor?

Parameterized constructors The constructors can be called explicitly or implicitly. The method of calling the constructor implicitly is also called the shorthand method. If we want to initialize fields of the class with your own values, then use a parameterized constructor. Example e = Example(0, 50); // Explicit call.

Is a constructor a void method?

Because constructor function returns the object it creates, not Void.

Why we use parameterized constructor?

The parameterized constructors are the constructors having a specific number of arguments to be passed. The purpose of a parameterized constructor is to assign user-wanted specific values to the instance variables of different objects.

What is default constructor with example?

In both Java and C#, a “default constructor” refers to a nullary constructor that is automatically generated by the compiler if no constructors have been defined for the class. The default constructor implicitly calls the superclass’s nullary constructor, then executes an empty body.

Can constructor can take any number of parameters?

You can use any data type for a parameter of a method or a constructor. This includes primitive data types, such as doubles, floats, and integers, as you saw in the computePayment method, and reference data types, such as objects and arrays.

Can a class have multiple constructor?

There can be multiple constructors in a class. However, the parameter list of the constructors should not be same. This is known as constructor overloading.

Can a constructor be 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.

Can a constructor be overloaded?

Constructors can be overloaded in a similar way as function overloading. Overloaded constructors have the same name (name of the class) but the different number of arguments. Depending upon the number and type of arguments passed, the corresponding constructor is called.

Can a constructor be final?

No, a constructor can’t be made final. A final method cannot be overridden by any subclasses. … In other words, constructors cannot be inherited in Java therefore, there is no need to write final before constructors.

Can a parameterized constructor be a default constructor?

You can’t call a default constructor once you’ve created a constructor that takes arguments. You’ll have to create the no argument constructor yourself in order to make a call from the parameterized constructor.

What is the difference between default constructor and parameterized constructor?

The default constructor is a constructor that the compiler automatically generates in the absence of any programmer-defined constructors. Conversely, the parameterized constructor is a constructor that the programmer creates with one or more parameters to initialize the instance variables of a class.

Can we have return type for constructor?

No, constructor does not have any return type in Java. … It does not have a return type and its name is same as the class name. Mostly it is used to instantiate the instance variables of a class. If the programmer doesn’t write a constructor the compiler writes a constructors on his behalf.