Can constructor have return type in Java?

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.

What is the return type of constructors a int?

Therefore, the return type of a constructor in Java and JVM is void.

What does constructor return in Java?

A constructor returns a new instance of the class it belongs to, even if it doesn’t have an explicit return statement. constructor if doesnt return anything then why this is used inside each constructor by compiler implicitly to return this.

Can constructor contain return type?

Constructors do not have a return type.

How do you return a constructor in Java?

No, constructor does not return any value.

1. While declaring a constructor you will not have anything like return type.
2. In general, Constructor is implicitly called at the time of instantiation.
3. And it is not a method, its sole purpose is to initialize the instance variables.

Why constructor has no return type?

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.

Why Java constructor have no return type?

3 Answers. Constructor is internally a nonstatic method with name and void return type. It does not return anything. Internally first object is allocated and then its constructor is called.

Why constructor does not return value in Java?

Why constructor have no return type?

Does constructor return a value in Java?

There are no “return value” statements in the constructor, but the constructor returns the current class instance. We can write ‘return’ inside a constructor.

Can constructor have void return type?

Note that the constructor name must match the class name, and it cannot have a return type (like void ). Also note that the constructor is called when the object is created.

Can Constructors return a value in Java?

Constructors cannot return a value; they return the constructed object, so to speak. You get an error because the compiler is looking for a constructor that takes a string as its argument.

What is a constructor in Java?

From the Java Documentation: A class contains constructors that are invoked to create objects from the class blueprint. Constructor declarations look like method declarations—except that they use the name of the class and have no return type.

Is it possible to return an int or a string?

You cannot return either an int or a String. You have to pick one type and you should re-think your design, if you want to output a message. E.g. just check the return value of changeHealth () after calling the method. Or you could define a custom exception (or use an existing one). Just to get you started:

What is a no-argument constructor?

If no specific constructor is explicitly defined, the compiler automatically creates a no-argument constructor. Constructors cannot return a value; they return the constructed object, so to speak. You get an error because the compiler is looking for a constructor that takes a string as its argument.