Hello,

I'm trying to learn LinkedLists but I can't figure out how to print it using the ToString method.

import java.util.LinkedList;

public class MyString {
    private LinkedList<Character> list;

    public MyString(){ //constructor
        this.list = list;
    }

    public void append(char c){ //add char to list
        list.add(c);
    }

    public int indexOf(char c){ //return the index of a char
        for (int i = 0; i < list.size(); i++) {
            if (list.get(i) == c) {
                return i;
            }
        }
        return -1;
    }

    public char charAt(int index) throws IndexOutOfBoundsException{ //return the char at an index
        return list.get(index);        
    }

    public String toString(){ //print list
        return list;
    }

    public static void main(String[] args) {
        
    }
}

I googled around but didn't quite understand the concept.

Currently the error I'm getting for my ToString method is: Type mismatch: cannot convert from LinkedList<Character> to String

Any help is appreciated :)

Hey y'all. Learning about Linked Lists in my class at the moment, and my professor wasn't able to teach us much about linked lists (family issues). He's unavailable until the end of the semester, but with that being two weeks away, I'm in a bind.

Tasked with an assignment that creates a linked list of movies. The 'movie' class creates objects with 5 attributes along with an override of the toString method. In the actual linked lists class, there is a show_all() method that's called in the main method - it utilizes the toString method in order to print a label for the movie objects. However, my show_all() method isn't displaying the label when called on. Here's the method:

public static class BlueRayDisk{
        public String title, director;
        public int yearOfRelease;
        public double cost;

        public BlueRayDisk(String t, String d, int y, double c){
            this.title = t;
            this.director = d;
            this.yearOfRelease = y;
            this.cost = c;
        }

        public String toString(){
            return "$" + cost + " " + yearOfRelease + " " + title + ", " + director;
        }
    }

public static class Node{
        public BlueRayDisk disk;
        public Node next;
    }

    public static class BlueRayCollection{
        private Node head = null;

        public void add(String title, String director, Integer year, Double cost){
             Node tempNode = new Node();
             tempNode.disk = new BlueRayDisk(title,director,year,cost);

             if (head == null)
             {
                 head = tempNode;
             }
             else{
                 Node current = head;

                 while(current.next!= null){
                     current = current.next;

                 }
                 current.next = tempNode;

             }


        }

        public void show_all(){
            Node current = head;
           

            while(current.next != null){
                System.out.println(current.disk);
                current = current.next;
            }

        }

    }

public static void main (String[] args){
        BlueRayCollection a = new BlueRayCollection();
        int user;
        String titl,dir;
        Integer year;
        Double cost;
        Scanner scan = new Scanner(System.in);
        do{
            System.out.println("0. Quit\n" +
                    "1. Add BlueRay to collection\n" +
                    "2. See collection");

            user = scan.nextInt();

            switch(user){
                case(0):
                    break;
                case(1):
                    System.out.println("What is the title?");
                    titl = scan.next();
                    System.out.println("What is the director?");
                    dir = scan.nextLine();
                    scan.nextLine();
                    System.out.println("What is the year of release?");
                    year = scan.nextInt();
                    System.out.println("What is the cost?");
                    cost = scan.nextDouble();

                    a.add(titl,dir,year,cost);
                    break;
                case(2):
                    a.show_all();
                    break;

            }

        }while (user != 0);
    }

Am I missing something? I am struggling with the concept of linked lists a little, but I was able to get my add method to work.

EDIT: Added the LinkedList class (named BlueRayCollection) for clarification along with the node class. Main method shows the add/print all methods in action.