final method issues in overriding

Demo 1:
// super class final method sub class non-final method
package oops;
class Superclass
{
final void m1()
{
    System.out.println("Super class method");
}
}
public class Subclass extends Superclass {

    void m1() // compile time error 
  //can not overide the final method from superclass
    {
        System.out.println("Sub class method");
    }
    public static void main(String[] args) {
        Subclass  s=new Subclass();
        s.m1();    
    }

}

Demo 2:
// super class non-final method, sub class final method
package oops;
class Superclass
{
void m1()
{
    System.out.println("Super class method");
}
}
public class Subclass extends Superclass {

    final void m1() //no error
    {
        System.out.println("Sub class method");
    }
    public static void main(String[] args) {
        Subclass  s=new Subclass();
        s.m1();    // sub class
    }

}