Anonymous array

class Arr
{
static int i=5;

 static void F(int p[])
  {
  for(i=0;i<p.length;i++)
  {
  System.out.print(p[i]+" ");
 
   }
   }



 public static void main(String args[])
 {
  Arr a= new Arr();
   int i,j;

   F(new int[] {1,2,3,4});
 


  }

}

Dynamic Dispatch With abstract Function

abstract class A
{
int d1;
int d2;

abstract double area();

 A(int a, int b)
{
d1=a;
d2=b;

}

}


class B extends A
{
  B(int a,int b)
  {
  super(a,b);
  }

  double area()
  {
   return (d1*d2);
  }


}




class C extends A
{
 C(int a, int b)
 {
  super(a,b);
 }

 double area()
{
return d1*d2;
}

}

class over
{
public static void main(String args[])
{
C c=new C(5,3);
B b=new B(4,5);
A r;
r=c;
System.out.println(r.area());
r=b;
System.out.println(r.area());

}
}

Dynamic Method dispatch

class A
{


void show()
{
System.out.println("\n it is of a class");
}

}


class B extends A
{
void show()
{

System.out.println("\n it is of B class");
}


}




class C extends B
{
void show()
{

System.out.println("\n it is of C class");
}

}

class over
{
public static void main(String args[])
{
C c=new C();
A a =new A();
B b=new B();
A r;
r=a;
a.show();
r=b;
b.show();
r=c;
r.show();
}
}

Function overriding In java

class A
{


void show()
{
System.out.println("\n it is of a class");
}

}


class B extends A
{
void show()
{
super.show();
System.out.println("\n it is of B class");
}


}




class C extends B
{
void show()
{
super.show();
System.out.println("\n it is of C class");
}

}

class over
{
public static void main(String args[])
{
C c=new C();
c.show();
}
}