LinkList Rotate ClockWise

class ReverseLink1{
    Node head;
    class Node{
        int data;
        Node next;

        public Node(int data){
            this.data=data;
            this.next=null;
        }

        @Override
        public String toString() {
            return "{"+this.data +"}";
        }
    }

    public void push(int data){
        Node node=new Node(data);
        if(head==null){
            head=node;
        }else{
            Node current=head;
            while(current.next!=null){
                current=current.next;
            }
            current.next=node;
        }
    }
    public void display(Node head){
        if(head == null){
            System.out.println("No data");
        }else{
            Node current=head;
            while(current!=null){
                System.out.print(current);
                current=current.next;
            }
            System.out.println("");
        }
    }

    public Node revers(Node head, int k){
        if(head == null||head.next == null||k == 0) return head;
        //calculating length
        Node temp = head;
        int length = 1;
        while(temp.next != null) {
            ++length;
            temp = temp.next;
        }
        System.out.println("Length " +length);
        //link last node to first node
        temp.next = head;
        k = k%length; //when k is more than length of list
        int end = length-k; //to get end of the list
        while(end--!=0) temp = temp.next;
        //breaking last node link and pointing to NULL
        head = temp.next;
        temp.next = null;

        return head;
    }
}

public class ReverseLinkList1 {

    public static void main(String[] args) {
        ReverseLink1 reverseLink1=new ReverseLink1();
        reverseLink1.push(1);
        reverseLink1.push(2);
        reverseLink1.push(3);
        reverseLink1.push(4);
        reverseLink1.push(5);
        reverseLink1.push(6);
        reverseLink1.push(7);
        reverseLink1.display( reverseLink1.head);
        ReverseLink1.Node revers = reverseLink1.revers(reverseLink1.head, 3);
        reverseLink1.display(revers);

    }
}