Please review my implementation of Circular Singly Linked Listpublic class NodeS {    public int num;    public NodeS next;    public NodeS(int n){        this.num = n;    }}public class SinglyCircularList {    private static NodeS head = null;    private static NodeS tail = null;    private static int size = 0;    public static int getSize() {        return size;    }    public static void insert(int n) {        NodeS node = new NodeS(n);        node.next = tail;        if (tail == null) {            tail = node;        } else {            head.next = node;        }        head = node;        size++;    }    public static int delete() {        if (!isEmpty()) {            NodeS deq = tail;            tail = deq.next;            size--;            if (size == 0) {                tail = null;            }            head.next = tail;            return deq.num;        } else {            System.out.println(List Empty !!);        }        return -1;    }    public static boolean isEmpty() {        return size == 0;    }    public void printList() {        NodeS temp = tail;        for (int i = 0; i <= size; i++) {            if (temp != null) {                System.out.print(temp.num);                temp = temp.next;            }        }        System.out.println();    }    /**     * @param args     */    public static void main(String[] args) {        SinglyCircularList scl = new SinglyCircularList();        scl.insert(1);        scl.insert(2);        scl.insert(3);        scl.insert(4);        scl.insert(5);        scl.insert(6);        scl.insert(7);        scl.printList();        System.out.println(Del-> + scl.delete());        scl.insert(8);        scl.printList();        System.out.println(Del-> + scl.delete());        System.out.println(Del-> + scl.delete());        System.out.println(Del-> + scl.delete());        System.out.println(Del-> + scl.delete());        System.out.println(Del-> + scl.delete());        System.out.println(Del-> + scl.delete());        System.out.println(Del-> + scl.delete());        System.out.println(Del-> + scl.delete());        scl.printList();        scl.insert(9);        scl.insert(10);        scl.printList();    }}
Circular Singly Linked List using Java
java;linked list;circular list