Program to explain final class restricts (not allow) in Java

// Program to explain final class restricts (not allow) 
// the inheritance from that class.
final class A
{
void display()
{
 System.out.println(" A\'s display().");
}
}
// final class can't be inherited.
// class B extends A // Error
class B
{
void display()
{
 System.out.println(" B\'s display().");
}
}
class  FinalClassTest
{
public static void main( String args[ ] )
{
 A a = new A();
 B b = new B();
 a.display();
 b.display();
}
}

Output:
A's display().
B's display().