Added NodeNumber.java

Ds/LinkedList/NodeNumber.java

@@ -0,0 +1,69 @@
+public class NodeNumber {
+ class Node{
+	 Node next;
+	 int data;
+
+	 Node(int d){
+		 this.data=d;
+		 this.next=null;
+	 }
+ }
+
+ public Node head=null;
+ public Node tail=null;
+
+ public void addNode(int data) {
+	 Node newNode= new Node(data);
+
+	 if(head==null) {
+		 head=newNode;
+		 tail=newNode;
+	 }
+	 else {
+		 tail.next=newNode;
+		 tail=newNode;}
+	 }
+
+
+public int NodeNumber() {
+int count=0;
+//NOde current will point to head
+
+Node current=head;
+
+while(current!=null) {
+	//increment count by 1
+count++;
+current=current.next;
+}
+
+return count;
+
+}
+
+public void Display() {
+	Node current=head;
+	if(head==null) {
+		System.out.print("List is empty");
+		return ;
+		}
+	System.out.print("Nodes in Linked LIst are as follows:");
+	while(current!=null) {
+		//prints each node by incrementing pointer
+		System.out.print(current.data+" ");
+		current=current.next;
+	}
+	}
+
+public static void main(String args[]) {
+	NodeNumber list=new NodeNumber();
+	list.addNode(12);
+	list.addNode(34);
+	list.addNode(45);
+	list.addNode(23);
+
+	list.Display();
+	System.out.println();
+	System.out.print("Number of nodes are "+ list.NodeNumber());
+}
+}