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Java Java Data Structures Organizing Data Serialization

Error: Cannot find symbol on save(Treet[] treets)

I am just using CMD line. Tried using NetBeans and still got this error.


package com.teamtreehouse;

import java.io.*;

public class Treets { // THIS LINE BELOW IS WHERE I GET 'Cannot find symbol Treet' public static void save(Treet[] treets) { try ( FileOutputStream fos = new FileOutputStream("treets.ser"); ObjectOutputStream oos = new ObjectOutputStream(fos); ) { oos.writeObject(treets); } catch(IOException ioe) { System.out.println("Problem saving Treets"); ioe.printStackTrace(); } } }


package com.teamtreehouse;

import java.io.Serializable; import java.util.Date;

public class Treet implements Comparable, Serializable { private String mAuthor; private String mDescription; private Date mCreationDate;

public Treet(String author, String description, Date creationDate){
    mAuthor = author;
    mDescription = description;
    mCreationDate = creationDate;

public String toString() {
    return String.format("Treet: \"%s\" by %s on %s", mDescription, mAuthor, mCreationDate);

public int compareTo(Object obj) {
    Treet other = (Treet) obj;
    if (equals(other)) {
        return 0;
    int dateCmp = mCreationDate.compareTo(other.mCreationDate);
    if (dateCmp == 0) {
        return mDescription.compareTo(other.mDescription);
    return dateCmp;

public String getAuthor() {
    return mAuthor;

public String getDescription() {
    return mDescription;

public Date getCreationDate() {
    return mCreationDate;

public String[] getWords() {
    return mDescription.toLowerCase().split("[^\\w#@']+");


2 Answers

It looks like Treet is complaining that it doesn't know what Treet is. Have you double checked if they both belong to the same package? Because in case they are in different packages, Treet needs to be imported into Treets.

Alright I answered my own question. FYI all my packaging info and imports are correct within my code. I was trying to compile my Treet.java and Treets.java files on their own. When I compiled Example.java it ended up taking care of it.

Also just to clarify for anyone after me, I am using Windows cmd line, not Treehouse Workspaces. It's a little bit different.