Quick Answer: What Is The Purpose Of Void In Java?

Why do we use void 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.

main: It is the name of Java main method.

It is the identifier that the JVM looks for as the starting point of the java program..

Is void a Java type?

Since JDK 1.1, Java provides us with the Void type. Its purpose is simply to represent the void return type as a class and contain a Class public value. It’s not instantiable as its only constructor is private.

What is a void method?

The void Keyword This method is a void method, which does not return any value. Call to a void method must be a statement i.e. methodRankPoints(255.7);. It is a Java statement which ends with a semicolon as shown in the following example.

What is the difference between public void and private void?

The keywords ‘public’ and ‘void’ designate different things about a method; they are not related to the same concept. … There are other designations — private and protected — that mean other things; private, for instance, designates a method that can only be called from within the class in which it is declared.

Is String args necessary in Java?

There’s no significant downside in having to include the parameter. The Java runtime system looks specifically for a method with a single String[] type parameter, because it wants to pass the parameters to your main method. If such a method is not present, it informs you through an exception.

What is the purpose of void?

void (C++) When used as a function return type, the void keyword specifies that the function does not return a value. When used for a function’s parameter list, void specifies that the function takes no parameters. When used in the declaration of a pointer, void specifies that the pointer is “universal.”

What is public void in Java?

public means that the method is visible and can be called from other objects of other types. … This means that you can call a static method without creating an object of the class. void means that the method has no return value. If the method returned an int you would write int instead of void .

What does string [] args mean?

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.

Is private a keyword in Java?

The private keyword is an access modifier used for attributes, methods and constructors, making them only accessible within the declared class.

Is void a type?

The void type, in several programming languages derived from C and Algol68, is the type for the result of a function that returns normally, but does not provide a result value to its caller. Usually such functions are called for their side effects, such as performing some task or writing to their output parameters.

Is Class A keyword in Java?

The class keyword is used to create a class. Every line of code that runs in Java must be inside a class. A class should always start with an uppercase first letter, and the name of the java file must match the class name.

What is difference between public static and void?

public − This is the access specifier that states that the method can be accesses publically. static − Here, the object is not required to access static members. void − This states that the method doesn’t return any value.