Can I call the main method of a class from another class?

Though Java doesn’t prefer main() method called from somewhere else in the program, it does not prohibit one from doing it as well. So, in fact, we can call the main() method whenever and wherever we need to.

Can you call a class within another class?

Non-static nested classes are called inner classes. Nested classes that are declared static are called static nested classes. A nested class is a member of its enclosing class. Non-static nested classes (inner classes) have access to other members of the enclosing class, even if they are declared private.

How do you call a main class in Java?

To call a method in Java, write the method name followed by a set of parentheses (), followed by a semicolon ( ; ). A class must have a matching filename ( Main and Main. java).

How can we call main method in Java?

The main method in the Java language is similar to the main function in C and C++. When the Java interpreter executes an application (by being invoked upon the application’s controlling class), it starts by calling the class’s main method.

Can I make class private?

No, we cannot declare a top-level class as private or protected. It can be either public or default (no modifier).

Which of the following methods belong to object class?

Explanation: The notify(), notifyAll(), and wait() are the methods of the Object class.

Can we create object of a class inside the same class?

No, the main method only runs once when you run your program. It will not be executed again. So, the object will be created only once. Think of your main method to be outside your class.

Can classes be final?

Note that you can also declare an entire class final. A class that is declared final cannot be subclassed. This is particularly useful, for example, when creating an immutable class like the String class.

Can a class be private in C++?

Private: The class members declared as private can be accessed only by the member functions inside the class. They are not allowed to be accessed directly by any object or function outside the class. Only the member functions or the friend functions are allowed to access the private data members of a class.

Can a class be declared as synchronized?

Although there are situations when it makes perfect sense to make all methods of a class synchronized , a class typically contains other declarations that cannot be synchronized . For example, class constructor cannot be marked synchronized . Same goes for fields of a class.

Can you declare the main method as final?

Yes, we can declare the main () method as final in Java. The compiler does not throw any error. If we declare any method as final by placing the final keyword then that method becomes the final method. The main use of the final method in Java is they are not overridden.

Can a class be static?

A class can be declared static only if it is a nested class. It does not require any reference of the outer class. The property of the static class is that it does not allows us to access the non-static members of the outer class.

What happens if a class is declared as final?

The main purpose of using a class being declared as final is to prevent the class from being subclassed. If a class is marked as final then no class can inherit any feature from the final class. You cannot extend a final class. If you try it gives you a compile time error.

Can we have a class without main method?

Yes, we can execute a java program without a main method by using a static block. Static block in Java is a group of statements that gets executed only once when the class is loaded into the memory by Java ClassLoader, It is also known as a static initialization block.

Can we declare main method as private?

Yes, we can declare the main method as private in Java. It compiles successfully without any errors but at the runtime, it says that the main method is not public.

Can we overload main method?

Yes, We can overload the main method in java but JVM only calls the original main method, it will never call our overloaded main method.

Can we create a program without main method Javatpoint?

A program that does not have the main() method gives an error at run time. So the main() method should always be written as: public static void main(String args[])

Can we execute program without main in C?

So actually C program can never run without a main() . We are just disguising the main() with the preprocessor, but actually there exists a hidden main function in the program.

Does every class need a main method Java?

It is not necessary to have main method in every java class main method is the entry point of java application. There can be a class without main method.

Why program is named with class containing main method?

When java runtime starts, there is no object of the class present. That’s why the main method has to be static so that JVM can load the class into memory and call the main method. If the main method won’t be static, JVM would not be able to call it because there is no object of the class is present.