List Link 구현예제를 따라해보는데 계속

error: unexpected type curr.next() = curr.next().next(); //오류 ^ required: variable found: value

뜨면서 오류가 걸립니다.

똑같은 item은 오류가 안걸리는데 next만 이러네요..?

interface MyList{ public void clear(); public void insert(int pos, E item); public void append(E item); public void update(int pos, E item); public E getValue(int pos); public E remove(int pos); public int length(); }

class Link { private E item; private Link next;

Link(E item, Link<E> next) {
    this.item = item;
    this.next = next;
}

Link<E> next() { return next; }
Link<E> setNext(Link<E> next) { return this.next = next; }
E item() { return item; }
E setItem(E item) { return this.item = item; }

}

class LinkedList implements MyList{

private Link<E> head, tail;
int size;

public Link<E> head(){
    return head;
}

public LinkedList() {
    head = tail = new Link<>(null, null);
    size = 0;
}

public void clear() { head.setNext(null);}

public void insert(int pos, E item) {
    Link<E> curr = head;
    for (int i = 0; i < pos; i++)
        curr = curr.next();
        curr.next() = new Link<E>(item, curr.next()); //오류
}

public void update(int pos, E item) {
    Link<E> curr = head;
    for(int i=0; i<pos; i++) curr = curr.next();
    curr.setItem(item);
}


public E getValue(int pos) {
    Link<E> curr = head;
    for(int i=0; i<pos; i++) curr = curr.next();
    return curr.item();
}

public E remove(int pos) {
    Link<E> curr = head;
    for (int i = 0; i < pos; i++)
        curr = curr.next();
    if(curr.next() == tail)
        tail = curr;
    E ret = curr.next().item();

    curr.next() = curr.next().next(); //오류
    size--;

    return ret;
}

public int length() {
    return size;
}

public void append(E item) {
    tail.next() = new Link<E>(item, null); // 오류
    tail = tail.next();  
    size++;
}

}