How to make my sort method sorts in alphabetical order a linked list of string

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Java

I am trying to sort in alphabetical order a Linked List in java but my method only works with integers.

What I have tried:

public Node sort()
{

Node current;
Node sortedList = null;
int count;

if(first == null)
throw new IllegalArgumentException("List is empty");

// Creating a loop that will go through the whole list.
for (int index = 1; index < size(); index++)
{
// Redirects the unsorteNode variable to the second element in the list.
current = first.next;

// Redriects the scan variable to index.
count = index;

// Creating a loop that will go thorught the list and swap values.
while (count > 0 && current.value.compareTo(first.value) > 0)
{
sortedList = new Node(current.value, first);
first = first.next;
current = current.next;
count--;
}

// Switches the values in its correct position.
first.next = current;
}

// Returns the sorted list.
return sortedList;

}