What will happen if we declare main method as non-static?

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. If such a method is not found, a run time error is generated.

What happens if main method is not static in Java?

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.

What will happen if we declare main method as private?

But if you declare main method as private, you would not be able to execute the class as a standalone java program. Any java class that needs to be executed as a standalone file needs to have a main method that is public, static and returns a void.

Can we declare non-static variable in main method?

Yes, the main method may access non-static variables, but only indirectly through actual instances. What people mean when they say “non-static variables cannot be used in a static method” is that non-static members of the same class can’t be directly accessed (as shown in Keppils answer for instance).

Why do we declare main method as static?

The main() method is static so that JVM can invoke it without instantiating the class. This also saves the unnecessary wastage of memory which would have been used by the object declared only for calling the main() method by the JVM. Void: It is a keyword and used to specify that a method doesn’t return anything.

Can we run the Java 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.

Why we declare main () method as public and static member?

Why main method is static can we execute a program without main () method if yes how?

Can we execute a java program without a main() method? [duplicate] Closed 8 years ago. According to my knowledge we cannot execute without a main method because when your running the java program. java Virtual machine look for the main method .

Can we declare main method as protected?

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 declare main method as final?

The short answer is Yes. You can declare main method as final. without any compile error.

Can you overload the 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 declare variable in main method?

Declaring a variable in the main method will make it available only in the main. Declaring a variable outside will make it available to all the methods of the class, including the main method.

What is the difference between static and non-static methods in Java?

You cannot call a non-static method from the main without instance creation, whereas you can simply call a static method.

Can We declare main() method as private or protected in Java?

Can we declare main () method as private or protected or with no access modifier in java? Java provides various access specifiers namely private, public and protected etc… The Private modifier restricts the access of members from outside the class. A class and interface cannot be public.

What is public static void main in Java?

Java is a kind of object-oriented programming, not a procedure programming. So every thing in your code should be manipulating an object. public static void main is only the entry of your program. It does not involve any object behind.

What is the difference between void main and main in Java?

void: In Java, every method has the return type. Void keyword acknowledges the compiler that main () method does not return any value. main (): It is a default signature which is predefined in the JVM. It is called by JVM to execute a program line by line and end the execution after completion of this method.