Linked list help simple little problem i need help with

okay so heres my code

Code java:

import java.util.Iterator;
import java.util.NoSuchElementException;
 
public class LinkedList<Item> implements Iterable<Item> {
 
private Node head;
private Node last;
private int size; //number of Nodes
 
/*
* head refers to the first node; head.previous is always null. last refers
* to the last node; last.next is always null.
*/
private class Node {
 
private Item item = null;
private Node next = null;
}
 
public LinkedList() {
head = null;
last = null;
size = 0;
}
 
//Add to the end of the list
public boolean add(Item item) {
 
Node n = new Node(); //create a new Node object
n.item = item; // store the data in this object
n.next = null; // this node will be placed at the end of the linked list
 
 
if (last == null) { //Adding to an empty LinkedList
head = last = n;
} else { //Adding to the end of a LinkedList with at least one element
last.next = n; //the current last node points to our new node
last = n; //last now points to the node we added
}
size++; //increase the size of the list
return true;
}
 
public int size() {
return size;
}
 
 
public boolean remove(Item item) {
boolean found = false;
 
if (head != null) { //if head = null, then the list is empty - return false
 
if (head.item.equals(item)) {// 1st Node contains the item
head = head.next; //remove the 1st Node
size--; //revise the size of the list
if (size == 0) //Did we remove the only item in the list?
{
last = null; // then set last to null
}
found = true; //we found the item in the LinkedList
} else {
 
Node current = head.next;
Node previous = head;
while (current != null && !found) { // current == null means we're at the end of the list
if (current.item.equals(item)) { // we found a match
previous.next = current.next; //remove the current node
size--;
found = true;
if (current == last) // we're removing the last item
{
last = previous; //set last to previous
}
} else { //we didn't find the item, so go to the next Node in the LinkedList
previous = current;
current = current.next;
}
}//end while
} //end else
}
 
return found;
}
 
public Iterator<Item> iterator() {
 
return new LinkedListIterator();
}
 
private class LinkedListIterator implements Iterator<Item> {
 
private Node current = head; 
 
public boolean hasNext() {
 
return current != null;
}
 
public Item next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
Item item = current.item; //get current key data
current = current.next; 
return item;
}
 
 
public void remove() {
 
 
}
}
//hw part
 
NEED HELP BELOW HERE!
 
public boolean removeLast() {
boolean found = false;
 
if (size!=0){
Node current = head.next;
Node previous = head;
while (current != null && !found) { // current == null means we're at the end of the list
previous.next= current.next;
size--;
found = true;
if (current == last) // we're removing the last item
{
last = previous; //set last to previous
}
}
previous = current;
current = current.next;
}
return found;
 
}
 
 
 
public static void main(String[] args) {
LinkedList<String> ll = new LinkedList<String>();
 
 
ll.add("a");
ll.add("b");
ll.add("c");
ll.add("d");
ll.add("e");
ll.add("f");
ll.add("g");
ll.add("h");
ll.add("i");
ll.add("j");
ll.add("k");
ll.add("l");
System.out.println();
System.out.println("size = " + ll.size());
 
for (String e : ll) {
System.out.println(e);
}
System.out.println();
 
if (ll.removeLast()) {
for (String e : ll) {
System.out.println(e);
}
}
System.out.println();
 
if (ll.removeLast()) {
for (String e : ll) {
System.out.println(e);
}
}
System.out.println();
 
if (ll.removeLast()) {
for (String e : ll) {
System.out.println(e);
}
}
 
 
}
}

and heres the out put i get

run:

size = 12
a
b
c
d
e
f
g
h
i
j
k
l

a
c
d
e
f
g
h
i
j
k
l

a
d
e
f
g
h
i
j
k
l

a
e
f
g
h
i
j
k
l

My problem is how do i get the code to remove it backwords starting with l then k then j and so forth please help thank you !