Does void return anything Java?

What does void function return in Java?

Void (NonValue-Returning) functions: … In lieu of a data type, void functions use the keyword “void.” A void function performs a task, and then control returns back to the caller–but, it does not return a value. You may or may not use the return statement, as there is no return value.

Does void return anything?

A void function cannot return any values.

Does void return NULL Java?

void is a keyword that means that a function does not result a value. java. lang. … As a result type (a function with a return value of type Void ) it means that the function *always * return null (it cannot return anything other than null , because Void has no instances).

What does void do in Java?

Void: It is a keyword and used to specify that a method doesn’t return anything. As main() method doesn’t return anything, its return type is void. As soon as the main() method terminates, the java program terminates too.

What is Java Lang void?

lang. Void class is a placeholder which holds a reference to a class object if it represents void keyword. It is a uninstantiable placeholder. Well, uninstantiable means that this class have a private constructor and no other constructor that we can access from outside.

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Why do constructors not return values?

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.

How do I return in void?

Some of cases are listed below.

  1. A void function can do return. We can simply write return statement in a void fun(). …
  2. A void fun() can return another void function.
  3. A void() can return a void value. A void() cannot return a value that can be used.

Why void does not return any value?

void is a type to represent nothing. That is a subtle difference : the representation is still required, even though it represents nothing. This type is used as function’s return type which returns nothing. This is also used to represent generic data, when it is used as void* .

What does it mean to return void?

In computer programming, when void is used as a function return type, it indicates that the function does not return a value. … When used in a function’s parameter list, void indicates that the function takes no parameters.

Is void necessary in Java?

So Void is not needed there.

Are void methods bad Java?

Summary. I will say it one more time just to be clear: in most cases void methods are bad and should be considered anti-pattern, using them may lead to a very tasteful spaghetti code where everything is implicitly stateful.

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Does void method return null?

Its purpose is simply to represent the void return type as a class and contain a Class<Void> public value. … Therefore, the only value we can assign to a Void variable is null.

Is scanner a keyword in Java?

Scanner is a class in java. util package used for obtaining the input of the primitive types like int, double, etc. … To create an object of Scanner class, we usually pass the predefined object System.in, which represents the standard input stream.

What is String [] args in Java?

String[] args means an array of sequence of characters (Strings) that are passed to the “main” function. This happens when a program is executed. Example when you execute a Java program via the command line: java MyProgram This is just a test. Therefore, the array will store: [“This”, “is”, “just”, “a”, “test”]