Reading From Text File - Print Linked List On Console

How can i convert this linked list code to a read from input.txt

The first line in the input file will give the elements to initialize the linked list with. Consecutive lines will provide operation instructions.

Your code should read one line at a time. After reading each line, it should perform the corresponding operation and print the linked-list on the console.

If an operation is not possible, it should print "N/A".

Sample input file. Please note, the comments (// ...) are given for explanation, the input file will not have them:

4, 5, 6, 3// First line. This will provide the initial values for the linked list : 4->5->6->3
1, 9// Add a 9 at the front of the linked-list. After this operation the linked-list should be: 9->4->5->6->3
2, 1// Add a 1 at the end of the linked-list. After this operation the linked-list should be: 9->4->5->6->3->1
3, // Delete the first node in the linked-list. After this operation the linked-list should be: 4->5->6->3->1
4, // Delete the last node in the linked-list. After this operation the linked-list should be: 4->5->6->3
5, 11// Delete the node with the value 11 in it. Since this is not possible, it should print "N/A"
5, 6// Delete the node with the value 6 in it. After this operation the linked-list should be: 4->5->3

Sample output to the console:

4->5->6->3
9->4->5->6->3
9->4->5->6->3->1
4->5->6->3->1
4->5->6->3
N/A
4->5->3

My Code:

LinkedList.Java

class linkedList
{
protected Node start;
protected Node end ;
public int size ;
 
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