LinkedList

import java.util.Scanner;
class Node{
	int data; 
 	Node next;
 	Node(int data) {
 		this.data=data;
 	} 
}

public class LinkedList {
Node start;
public void traverse() {
	if(start==null) {
	    System.out.println("LinkedLis is empty");
	    return;
	}
	Node cursor=start;
	while(cursor!=null) {
	  	System.out.println(cursor.data);
	   	cursor=cursor.next;
	}
}

public void add() { 
	Scanner scanner=new Scanner(System.in);
	System.out.print("Enter data: ");
	int data=Integer.parseInt(scanner.nextLine());
	Node node=new Node(data);
	if(start==null) start=node;
	else {
	 	Node cursor=start;
	 	while(cursor.next!=null)
	 	 cursor=cursor.next;
	 	 cursor.next=node;
	 	 }
}

public int countNodes() {
 	if(start==null) return 0;
 	int count=1;
 	Node cursor=start;
 	while(cursor.next!=null) {
 		 cursor=cursor.next; count++;
 	}
 	return count;
}

public void insert() {
 	Scanner scanner=new Scanner(System.in);
 	System.out.print("Enter position: ");
 	int pos=Integer.parseInt(scanner.nextLine());
 	System.out.print("Enter data: ");
 	int data=Integer.parseInt(scanner.nextLine());
 	Node node=new Node(data); 
 	if(pos<=1) {
 	 	node.next=start;
 	 	start=node;
 	 }
 	else {
 	 	int nodes=countNodes();
 	 	if(pos>nodes+1)
 	 	 	pos=nodes+1;
 	 	Node cursor=start;
 	 	int count=0;
 	 	while(count<pos-2) {
 	 	 	cursor=cursor.next;
 	 	 	count++; 
 	 	}
 	 	node.next=cursor.next;
 	 	cursor.next=node;
 	 }
}

public void delete(){
	Scanner scanner = new Scanner(System.in);
	System.out.print("Enter Position to Delete: ");
	int pos = Integer.parseInt(scanner.nextLine());
	scanner.close();
	if(start == null){
		System.out.println("LinkedLis is empty");
		return;
	}
	Node cursor = start;
	int curPos = 1;
	if(pos == 1){
		cursor = cursor.next;
		start = cursor;
	}
	else{
		while(curPos + 1 != pos){
			cursor = cursor.next;
			curPos++;
		}
		cursor.next = cursor.next.next;
		System.out.println("Node Deleted");

	}
}

public static void main(String[] args) {
  	LinkedList ll=new LinkedList();
  	Scanner scanner=new Scanner(System.in);
  	System.out.print("Enter number of nodes: ");
  	int nodes=Integer.parseInt(scanner.nextLine());
  	for(int i=0;i<nodes;i++)
  		ll.add();
  		ll.traverse();
  		ll.insert();
  		ll.traverse();
  		ll.delete();
  		ll.traverse();
} 
}