- Which method Cannot be overridden?
- Can we execute a program without main?
- Can we override main method?
- What is the purpose of a private constructor?
- Can we inherit private method in Java?
- Can final method be overloaded?
- How do you override a method?
- How can we override a method in inheritance?
- What is String  args?
- Can we override static method?
- Why is main method static?
- What happens if I remove static from main method?
- Can we override constructor?
- Can constructor be overloaded?
Which method Cannot be overridden?
A method declared final cannot be overridden.
A method declared static cannot be overridden but can be re-declared.
If a method cannot be inherited, then it cannot be overridden.
A subclass within the same package as the instance’s superclass can override any superclass method that is not declared private or final..
Can we execute a program 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 override main method?
No, we cannot override main method of java because a static method cannot be overridden. The static method in java is associated with class whereas the non-static method is associated with an object.
What is the purpose of a private constructor?
Private constructors are used to prevent creating instances of a class when there are no instance fields or methods, such as the Math class, or when a method is called to obtain an instance of a class.
Can we inherit private method in Java?
You can only call a private member method in its definition class. … say() because derived classes can’t inherit private methods from its base class. Only protected and public methods/variables can be inherited and/or overridden.
Can final method 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.
How do you override a method?
Rules for method overriding:In java, a method can only be written in Subclass, not in same class.The argument list should be exactly the same as that of the overridden method.The return type should be the same or a subtype of the return type declared in the original overridden method in the super class.More items…•
How can we override a method in inheritance?
Instance Methods The ability of a subclass to override a method allows a class to inherit from a superclass whose behavior is “close enough” and then to modify behavior as needed. The overriding method has the same name, number and type of parameters, and return type as the method that it overrides.
What is String  args?
The String args parameter is an array of Strings passed as parameters when you are running your application through command line in the OS. … String args means an array of sequence of characters (Strings) that are passed to the “main” function. This happens when a program is executed.
Can we override static method?
Can we override a static method? No, we cannot override static methods because method overriding is based on dynamic binding at runtime and the static methods are bonded using static binding at compile time. So, we cannot override static methods.
Why is main method 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. … Static method of a class can be called by using the class name only without creating an object of a class.
What happens if I remove static from main method?
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. Let’s see what happens when we remove static from java main method.
Can we override constructor?
Constructor looks like method but it is not. It does not have a return type and its name is same as the class name. But, a constructor cannot be overridden. If you try to write a super class’s constructor in the sub class compiler treats it as a method and expects a return type and generates a compile time error.
Can constructor be overloaded?
Yes! Java supports constructor overloading. In constructor loading, we create multiple constructors with the same name but with different parameters types or with different no of parameters.