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Final keyword in java
Final keyword can be used:
with class name
with method name
with variable name
Uses of final Keyword:
To prevent Inheritance: If we want to prevent a class from being inherited then we use final keyword.
To prevent Overriding: If we want that method should not be overriden by sub class then we use final keyword..
To make the value of variable as constant: If we make the variable final then this will be treated as constant its value remains unchanged.
Example:
final class A
{
------------
}
class B extends A//cant extend error
{
-----------
}
class A
{
final void finalmeth()
{
-----------
}
}
class B extends A
{
Void finalMeth()//error cant override
{
------------
}
}
