Can main method be 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 method be declared as final?

You can declare some or all of a class's methods final. You use the final keyword in a method declaration to indicate that the method cannot be overridden by subclasses. The Object class does this—a number of its methods are final .

Can main method be abstract and final?

But, in-case of abstract, you must override an abstract method to use it. Therefore, you cannot use abstract and final together before a method. If, you still try to declare an abstract method final a compile time error is generated saying “illegal combination of modifiers: abstract and final”.

Can main method be abstract?

Yes, you can use the main() method in abstract class. The main() method is a static method so it is associated with Class, not with object or instance. The abstract is applicable to the object so there is no problem if it contains the main method.

Does the main method have to be first?

The main method will always be excecuted first, because it is a special static method that will be called from Java itself to start an application.

Can we declare main method as final in Java ?

Can a program run without main?

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 have 2 main methods in Java?

From the above program, we can say that Java can have multiple main methods but with the concept of overloading. There should be only one main method with parameter as string[ ] arg.

Can we write main method in interface?

It cannot have a method body. Java Interface also represents the IS-A relationship. Like a class, an interface can have methods and variables, but the methods declared in an interface are by default abstract (only method signature, no body).

Can an interface inherit object class?

Object class. Interfaces in java don't inherit from Object class. They don't have default parent like classes in java.

Can abstract class have constructor?

Like any other classes in Java, abstract classes can have constructors even when they are only called from their concrete subclasses.

Can the interface be final?

If you make an interface final, you cannot implement its methods which defies the very purpose of the interfaces. Therefore, you cannot make an interface final in Java. Still if you try to do so, a compile time exception is generated saying “illegal combination of modifiers − interface and final”.

Can we make static method final?

Can a method be static and final together in java? When we declare a method as final we can not override that method in sub class. In the same way when we declare a static method as final we can not hide it in sub class means we can not create same method in sub class.

Can we override static method?

Overloading is the mechanism of binding the method call with the method body dynamically based on the parameters passed to the method call. Static methods are bonded at compile time using static binding. Therefore, we cannot override static methods in Java.

Can main method be 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 main method be overloaded?

The answer is, yes, we can overload the main() method. But remember that the JVM always calls the original main() method. It does not call the overloaded main() method.

Can we write main method in subclass?

Yes. If you run it, It'll execute parent class' main method. The static method will'be inherited but can't be overriden. If you define any static method with same name in subclass it'll only hide the parent method not override it.

Can we put a static method in interfaces?

Static methods in an interface since java8

Since Java8 you can have static methods in an interface (with body). You need to call them using the name of the interface, just like static methods of a class.

Can abstract class inherit another abstract class?

An abstract class can extend another abstract class. And any concrete subclasses must ensure that all abstract methods are implemented. Abstract classes can themselves have concrete implementations of methods. These methods are inherited just like a method in a non-abstract class.

Can abstract class inherit object class?

Yes abstract class does extends the object class. And it inherits properties of object class.

Can we execute interface?

Yes you can run a psvm in an interface, if you're working in Java 8 . Because static methods are allowed in an interface starting from Java 8. But of course, you cannot override the main method, since psvm is a static method.

Can we have public static void main in interface?

Yes, from Java8, interface allows static method.

Can we create object of abstract class?

We cannot create objects of an abstract class. To implement features of an abstract class, we inherit subclasses from it and create objects of the subclass. A subclass must override all abstract methods of an abstract class.

Can we inherit main method in Java?

Can we override main method in java ? Short answer is NO, we can not override main method in java. Reason is very simple. As main method is static and we know very well that we can not override static methods in Java, hence main method could not be overridden.

Why main method is static?

Why the main () method in Java is always static? 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.

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.