0
A final variable cannot have its value changed. It is used to define a constant. Assigning a value to a final variable after it is declared will cause a compiler error.
A final class cannot be sub-classed. It is used to prevent rogue programmers from sub-classing your classes and changing their behavior. Trying to extend a final class will cause a compiler error.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
When do you declare a variable method and a class final?
When There is No Need to Change the Values of the Variables In Entire lifetime of That variables then we must use that Variable as Final Variable.
What does the final keyword mean in front of a variable a method a class?
When used in a class declaration, the final keyword means the a class can't be subclassed. In other words, no other class can extend (inherit) a final class, and any attempts to do so will give you a compiler error. The final keyword prevents a method from being overridden in a subclass. Final methods are usually placed in classes where you don't want anyone who is extending your code to meddle with a certain piece of functionality. Declaring a variable with the final keyword makes it impossible to reassign a different value to that variable once it has been initialized with an explicit value -
What is public static final variable in java?
-Public to all - Static to access with Class Name - Final to change( constant and not alowed to change) Just use it along with class name. (As implied above, a 'public static final' variable in Java is what other languages would call a Constant. )
When do you declare method or class final?
final is a keyword.it can be used for three posibilities. they are ->we can assign the variable as final. to declaring the variable as final to avoid the reusability of a variable. now i display small program for this type. class A { final int i=10; a(int b) { i=b; System.out.println(i); } } public static void main(String args[]) { A x=new A(20); } } to execute this program .we have an error message.i.e.,the variable i can not be override. ->to use method have final keyword it can not be override.and also ->to use classes has final they can not be inhereted to sub classes.
Why use final in java?
The use of final denotes that a variable is a constant. For example: final int PI = 3.14; makes PI a constant. This is useful because now PI can't be changed, even accidentally, by you, the program, another programmer, or a user. Once a value is final, it is permanent, and can be used as a constant. Note: usually programmers capitalize the names of constants, just to make it clear that the value is a constant.
When do you declare a variable method and a class final?
When There is No Need to Change the Values of the Variables In Entire lifetime of That variables then we must use that Variable as Final Variable.
What does the final keyword mean in front of a variable a method a class?
When used in a class declaration, the final keyword means the a class can't be subclassed. In other words, no other class can extend (inherit) a final class, and any attempts to do so will give you a compiler error. The final keyword prevents a method from being overridden in a subclass. Final methods are usually placed in classes where you don't want anyone who is extending your code to meddle with a certain piece of functionality. Declaring a variable with the final keyword makes it impossible to reassign a different value to that variable once it has been initialized with an explicit value -
What is mean by Final?
final is a Java keyword. It is used to:> Mark a variable as final which prevents its value from being changed> Mark a class as final to prevent it from being extended> Mark a method as final to avoid it from beingoverridden
What are the difference between private variable and final variable?
A private variable is one that is accessible only to the current class and cannot be accessed by any other class, including the ones that extend from it. A final variable is one that cannot be modified once it is initialized and assigned a value.
What is public static final variable in java?
-Public to all - Static to access with Class Name - Final to change( constant and not alowed to change) Just use it along with class name. (As implied above, a 'public static final' variable in Java is what other languages would call a Constant. )
In oops what is the difference between class variable and variable?
Class Variable is a subset of Variables.
What do you mean by object adapter explain with an example?
The adapter method is when you create a class which wraps around another (holding that other class as a variable). The adapter class then responds to calls by calling the methods of the held variable.
When do you declare method or class final?
final is a keyword.it can be used for three posibilities. they are ->we can assign the variable as final. to declaring the variable as final to avoid the reusability of a variable. now i display small program for this type. class A { final int i=10; a(int b) { i=b; System.out.println(i); } } public static void main(String args[]) { A x=new A(20); } } to execute this program .we have an error message.i.e.,the variable i can not be override. ->to use method have final keyword it can not be override.and also ->to use classes has final they can not be inhereted to sub classes.
Why use final in java?
The use of final denotes that a variable is a constant. For example: final int PI = 3.14; makes PI a constant. This is useful because now PI can't be changed, even accidentally, by you, the program, another programmer, or a user. Once a value is final, it is permanent, and can be used as a constant. Note: usually programmers capitalize the names of constants, just to make it clear that the value is a constant.
what is the difference between final and static keywords?
static: we can use the keyword static either to method or to a variable. when we declare to a method,(eg: public static void main(String args[]),we can use this method without any object. when we use to a variable,there will be only one instance of that variable irrespective of how many objects that get created of that class. Final: Usage of final to method or to a variable makes them as constant. It's value cannot be changed...
What is the program to use the super and final keyword in java?
Many programs use those keywords.super refers to the direct superclass of the class referencing itfinal declares a variable or class unchangable
What is the static variable in the class in c?
A static member variable is local to the class rather than to an object of the class.
