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Count nodes in Circular linked list in java

Java program to create a Circular Linked List of N nodes and count the number of nodes

In this example, we will create a java program to find out the number of nodes present in the circular linked list.

Program:

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

public int count;    
public Node head = null;    
public Node tail = null;    

public void add(int data){    
Node newNode = new Node(data);    
if(head == null) {    
head = newNode;    
tail = newNode;    
newNode.next = head;    
}    
else {    
tail.next = newNode;    
tail = newNode;    
tail.next = head;    
}    
}    

public void countNodes() {    
Node current = head;    
do{    
count++;    
current = current.next;    
}while(current != head);    
System.out.println("Count of nodes present in circular linked list: "+count);    
}    

public static void main(String[] args) {    
Main cl = new Main();    
cl.add(1);    
cl.add(2);    
cl.add(4);    
cl.add(1);    
cl.add(2);    
cl.add(3);    
cl.countNodes();    
}    
}    


Output:-
Count of nodes present in circular linked list: 6

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