Can we execute a program 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.

How can I run a Java program without main method?

Does every program need a main method?

To compile a program, you doesn't really need a main method in your program. But, while execution JVM searches for the main method. In the Java the main method is the entry point Whenever you execute a program in Java JVM searches for the main method and starts executing from it.

Why do we need main method in Java?

Java main() method is always static, so that compiler can call it without the creation of an object or before the creation of an object of the class. In any Java program, the main() method is the starting point from where compiler starts program execution. So, the compiler needs to call the main() method.

What happens if we do not declare main method?

If your program doesn't contain the main method, then you will get an error “main method not found in the class”. It will give an error (byte code verification error because in it's byte code, main is not there) not an exception because the program has not run yet.

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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 a program run 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.

Should a main () method be compulsorily declared in all Java classes?

No, it is not required to have a main() method in every class; but for you to be able to access the class you need to call it from another class which has a main method and is in the same package as the class you need to use.

Is main method compulsory in every class in 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 is the main () method special in a Java program Mcq?

Explanation: main() method can be defined only once in a program. Program execution begins from the main() method by java runtime system. 5.

Can we override main method in Java?

Overriding main method

You cannot override static methods and since the public static void main() method is static we cannot override it.

Why main method is void in Java?

As the main() method doesn't return anything, its return type is void. As soon as the main() method terminates, the java program terminates too. Hence, it doesn't make any sense to return from the main() method as JVM can't do anything with the return value of it.

What happens if we write main () inside main () method?

Well,you can call a main() within the main() function ,but you should have a condition that does not call the main() function to terminate the program. Otherwise,the program will never return and run infinitely. It will cause a stack overflow when the stack space is used up.

Can we write main method without static in Java?

You can write the main method in your program without the static modifier, the program gets compiled without compilation errors. But, at the time of execution JVM does not consider this new method (without static) as the entry point of the program.

Can we run spring boot without main method?

You don't need the main method, all you need is to do is to extend SpringBootServletInitializer as Kryger mentioned. @SpringBootApplication public class Application extends SpringBootServletInitializer { @Override protected SpringApplicationBuilder configure(SpringApplicationBuilder application) { return application.

Can a main () method be declared 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.

Can I have main method for every class in a file?

Yes you can have more classes that contain public static void main(String[] args) . And you can chose to execute one class or another class. However, you can't have more than one main method within same class.

Does the main method need to be in a public class?

It has to be public so that java runtime can execute this method. Remember that if you make any method non-public then it's not allowed to be executed by any program, there are some access restrictions applied. So it means that the main method has to be public.

Is main function mandatory in C?

No, the ISO C standard states that a main function is only required for a hosted environment (such as one with an underlying OS). For a freestanding environment like an embedded system (or an operating system itself), it's implementation defined.

Can the main () function left empty?

Can the main() function left empty? Yes, possibly the program doing nothing. Can one function call another? Yes, any user defined function can call any function.

What is the main () in C?

A main() function is a user-defined function in C that means we can pass parameters to the main() function according to the requirement of a program. A main() function is used to invoke the programming code at the run time, not at the compile time of a program.

Can we overload main () method?

Yes, we can overload the main method in Java, but When we execute the class JVM starts execution with public static void main(String[] args) method.

How many main () function we can have in any C program?

No, you cannot have more than one main() function in C language. In standard C language, the main() function is a special function that is defined as the entry point of the program.

Can we run C program without header files?

So, in short, the answer is yes. We can compile C program without header file.