- Can we write main method in interface?
- What happens if we write main () inside main () method?
- Can a method be final?
- Can Final methods be overloaded?
- Which declaration of the main method is valid?
- Can we execute a class without a main method?
- Are private methods final?
- Can we override static method?
- Can we override private and final methods?
- Can we override private methods?
- When should a method be private?
- Can we have 2 main methods in Java?
Can we write main method in interface?
Answer : Yes, we can provide different implementation of main() declared in an interface and classes implementing that interface by overriding method and can overload static main method if defined in an interface.
Some more information regarding interface changes in Java 8..
What happens if we write main () inside main () method?
The process of calling a function by the function itself is known as Recursion. 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. Yes you can.
Can a method be 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 Final methods be overloaded?
private and final methods can be overloaded but they cannot be overridden. It means a class can have more than one private/final methods of same name but a child class cannot override the private/final methods of their base class.
Which declaration of the main method is valid?
thats why you need to specify string args or String… All these are valid/legal declarations of the main function in Java. The keywords public and static are interchangeable but mandatory. The parameter of the main method can take the var-args syntax.
Can we execute a class without a 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.
Are private methods final?
When we use final specifier with a method, the method cannot be overridden in any of the inheriting classes. Methods are made final due to design reasons. Since private methods are inaccessible, they are implicitly final in Java.
Can we override static method?
Can we Override static methods in java? We can declare static methods with the same signature in the subclass, but it is not considered overriding as there won’t be any run-time polymorphism. Hence the answer is ‘No’.
Can we override private and final methods?
No, We can not override private method in Java, just like we can not override static method in Java. … private methods are not even visible to Child class, they are only visible and accessible in the class on which they are declared. private keyword provides highest level of Encapsulation in Java.
Can we override private methods?
No, we cannot override private or static methods in Java. Private methods in Java are not visible to any other class which limits their scope to the class in which they are declared.
When should a method be private?
Private methods are useful for breaking tasks up into smaller parts, or for preventing duplication of code which is needed often by other methods in a class, but should not be called outside of that class.
Can we have 2 main methods in Java?
A class can define multiple methods with the name main. The signature of these methods does not match the signature of the main method. These other methods with different signatures are not considered the “main” method. Yes it is possible to have two main() in the same program.