Thread: toString method()

Well,I was hoping I could avoid this but here I am

My problem is the following. In this Class person

 
class Person {
  final String name;
  final String address;
  final String phoneNr;
 
  Person(String name, String address, String phoneNr) {
    this.name = name;
    this.address = address;
    this.phoneNr = phoneNr;
  }
 
  @Override
  public String toString() {
    return String.format("%-10s, %-20s, %-10s", name, address, phoneNr);
  }
 
}

There is this toString method.Now the instructions in the assignment say to rewrite it in the PhoneBookList class.

 
class PhoneBookList implements PhoneBook {
    private int size = 0;
    Node head = null;
 
    private static final class Node {
        final Person person;
        Node next;
 
        Node(Person person) {
            this.person = person;
        }
    }
 
   public boolean insert(Person person) {
 
        Node n = new Node(person);
 
        if (head == null) {
            head = n;
            size++;
            return true;
        }
 
        Node current = head;
        Node prev = null;
        int comparison;
 
        while (current != null) {
            comparison = person.name.compareTo(current.person.name);
            if (comparison == 0) {
                return false;
            } else if (comparison > 0) { 
 
                if (current.next == null) { 
                    current.next = n;
                    break;
                }
                current = current.next;
            } else { 
                if (prev == null) { 
                    Node oldHead = head;
                    head = n;
                    head.next = oldHead;
                    break;
                }
                prev.next = n;
                n.next = current;
                break;
            }
            prev = current;
            current = current.next;
        }
        size++;
        return true;
    }
 
	public int size() {
		Out.formatln("The phone book has: %d entries",size );
		return size;
	}
 
	public boolean delete(String name) {
        if (head == null) {
            return false;
		}
        if (head.person.name.compareTo(name) == 0) {
            head = head.next;
            size--;
            return true;
        }
 
        Node current = head;
        Node prev = head;
        while (current != null) {
            if (current.person.name.compareTo(name) == 0) {
                prev.next = current.next;
                size--;
                return true;
            }
            prev = current;
            current = current.next;
        }
		return false;
    }
 
	public Person lookup(String name) {
 
        if (head == null) { 
            return null;
        }
 
        Node current = head;  
        while (current != null) {
            if (current.person.name.compareTo(name)==0) { 
                return current.person;
            }
            current = current.next; 
        }
        return null;
    }
public String toString() {
    return String.format("%-10s, %-20s, %-10s", name, address, phoneNr);
  }
 
}
}

Now when I do this I get an compile error saying it cannot find these 3 parameters (name,address,phonenr). How do I implement this method?

Hey,just want to say that I have solved this issue with an StringBuilder. (the professor gave an us some hints and examples).But for some reason I couldn't log on to the site,better said "reach" the site till today.