Public void what does it mean

Hi everyone, sorry for asking too many questions because I'm new to java and other programming languages. A class may be declared with the modifier public, in which case that class is visible to all classes everywhere. If a class has no modifier the default, also known as package-private , it is visible only within its own package. Posting to the forum is only allowed for members with active accounts. Please sign in or sign up to post. Furthermore, what is the difference between public static void and public void in Java?

Public void : Used when you don't have to create an object and have no return. Public static void : Used when you need to create an object in the class itself.

Used at method declaration and definition to specify that the method does not return any type, the method returns void. Public members are visible to all other classes. This means that any other class can access a public field or method. Further, other classes can modify public fields unless the field is declared as final.

This means that you can call a static method without creating an object of the class. If the method returned an int you would write int instead of void. Why main method is static? Java program's main method has to be declared static because keyword static allows main to be called without creating an object of the class in which the main method is defined. In this case, main must be declared as public , since it must be called by code outside of its class when the program is started.

What does string [] args mean? String[] args in Java is an array of strings which stores arguments passed by command line while starting a program. All the command line arguments are stored in that array. What is main in Java? The main Method. A Java application is a public Java class with a main method.

The main method is the entry point into the application. The signature of the method is always: public static void main String[] args Command-line arguments are passed through the args parameter, which is an array of String s.

What is Polymorphism in Java? Polymorphism in Java is a concept by which we can perform a single action in different ways. We can perform polymorphism in java by method overloading and method overriding.

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