Write a function to print the middle of a given linked list

Question is available here : Write a C function to print the middle of a given linked list

The classes I used in the below code are available here.

class Main{

public static void main(String args[]){

MyLinkedList ll=new MyLinkedList();

ll.add(1);

ll.add(1);

ll.add(3);

ll.add(4);

ll.add(5);

ll.add(6);

ll.add(7);

System.out.println(ll);

Node ptr1,ptr2;

ptr1=ll.head;

ptr2=ll.head.getLink().getLink();

while(ptr2!=null){

if(ptr2.getLink()==null){

ptr1=ptr1.getLink();

break;

}

else{

ptr1=ptr1.getLink();

ptr2=ptr2.getLink().getLink();

}

}

System.out.println(ptr1.getData());

}

}