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How can final class be used?
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Answer / pranab dutta
A final class may not be subclassed so a final class can't
be extended. It means a final method can't be overridden
when its class is inherited. A final variable is a constant
which you can't change value of a final variable.
| Is This Answer Correct ? | 13 Yes | 0 No |
Answer / user
One scenario where final is important, when you want to prevent inheritance of a class, for security reasons. This allows you to make sure that code you are running cannot be overridden by someone.
The best example is
public final class String
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / jayant gope
Final is keyword that can be used with class, method and also with the variable.
Class: When final is used with the class, it means that class cannot be further extended or inherited by the other classes. So, final keyword restricts class from being inherited.
Method: When final is used with the method, this means that method cannot be overridden.
Variable: When final is used with the variable, it makes the variable constant i.e. the variable cannot be further modified.
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / rajkumar ksr college
interface Used to declare a special type of class that only
contains abstract methods, constant ( static final ) fields
and static interfaces. It can later be implemented by
classes that declare the interface with the implements
keyword
http://en.wikipedia.org/wiki/Java_keywords
Class verifier from JDK 1.2 beta 4 also makes it impossible
for JavaGO to inline constructors and replace virtual calls
with non-virtual.JavaGO has special options -not-inline-
constructor and -not-use-invokespecial to disable such
optimizations.Option -not-inline-virtual prevents JavaGO
from inlining virtual methods (while it can still inline
final and static methods)and in conjunction with -not-use-
invokespecial option makesoptimization performed by JavaGO
really safe (such classes can be used with other classes
not presented to JavaGO), but looks like such
optimizationsalso can be done by Java compiler with -O
option.
| Is This Answer Correct ? | 2 Yes | 2 No |
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