- 1 What is the purpose of static in Java?
- 2 What does it mean by static in Java?
- 3 What is difference between final and static?
- 4 Can we override static method?
- 5 Why we Cannot override static method?
- 6 What is the static?
- 7 What are static methods?
- 8 Can static be final?
- 9 Can a constructor be final?
- 10 Can we inherit static method in Java?
- 11 What is method hiding?
- 12 Can we override main method?
- 13 Can we override private method?
What is the purpose of static in Java?
In Java, static keyword is mainly used for memory management. It can be used with variables, methods, blocks and nested classes. It is a keyword which is used to share the same variable or method of a given class. Basically, static is used for a constant variable or a method that is same for every instance of a class.
What does it mean by static in Java?
When a member is declared static, it can be accessed before any objects of its class are created, and without reference to any object. For example, in below java program, we are accessing static method m1() without creating any object of Test class.
What is difference between final and static?
The main difference between a static and final keyword is that static is keyword is used to define the class member that can be used independently of any object of that class. Final keyword is used to declare, a constant variable, a method which can not be overridden and a class that can not be inherited.
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 we Cannot 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.
What is the static?
pertaining to or characterized by a fixed or stationary condition. showing little or no change: a static concept; a static relationship. lacking movement, development, or vitality: The novel was marred by static characterizations, especially in its central figures.
What are static methods?
Static methods are the methods in Java that can be called without creating an object of class. They are referenced by the class name itself or reference to the Object of that class.
Can static be final?
Constant variables never change from their initial value. Static variables are stored in the static memory, mostly declared as final and used as either public or private constants.
Can a constructor be final?
No, a constructor can ‘t be made final. A final method cannot be overridden by any subclasses. But, in inheritance sub class inherits the members of a super class except constructors. In other words, constructors cannot be inherited in Java therefore, there is no need to write final before constructors.
Can we inherit static method in Java?
Static methods are inherited in Java but they don’t take part in polymorphism. If we attempt to override the static methods they will just hide the superclass static methods instead of overriding them. Static method is inherited in subclass but it is not polymorphism.
What is method hiding?
Method hiding means subclass has defined a class method with the same signature as a class method in the superclass. In that case the method of superclass is hidden by the subclass. It signifies that: The version of a method that is executed will NOT be determined by the object that is used to invoke it.
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. Therefore, it is not possible to override the main method in java.
Can we override private method?
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.