Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Java Java Data Structures - Retired Organizing Data Comparable

Error: Task 1 is no longer passing but after going back to Task 1 it's actually passing wtf?!

And in that case I don't have any preview to the console where I would expect to see compilation errors.

Could anyone take a look at my code and tell me what did I do wrong?

com/example/BlogPost.java
package com.example;

import java.util.Date;

public class BlogPost implements Comparable {
  private String mAuthor;
  private String mTitle;
  private String mBody;
  private String mCategory;
  private Date mCreationDate;

  public BlogPost(String author, String title, String body, String category, Date creationDate) {
    mAuthor = author;
    mTitle = title;
    mBody = body;
    mCategory = category;
    mCreationDate = creationDate;
  }

  public String[] getWords() {
    return mBody.split("\\s+");
  }

  public String getAuthor() {
    return mAuthor;
  }

  public String getTitle() {
    return mTitle;
  }

  public String getBody() {
    return mBody;
  }

  public String getCategory() {
    return mCategory;
  }

  public Date getCreationDate() {
    return mCreationDate;
  }

  @Override
  public int compareTo(Object obj){
    if(((BlogPost)obj).equals(obj)){
      return 0;
    }
    return 1;
  }
}

1 Answer

Yanuar Prakoso
Yanuar Prakoso
15,196 Points

Hi there... You need to cast the obj first.

 @Override
  public int compareTo(Object obj){
    if(((BlogPost)obj).equals(obj)){//<-- this is not how you cast an Object and sure is not how equals work
      return 0;
    }
    return 1;
  }

This is the revision version of your code:

@Override
  public int compareTo(Object obj) {
    BlogPost blogPost = (BlogPost) obj;//<-- this is casting
    if(equals(obj)){//<-- this is how to use equals
      return 0;
    }
    return 1;
  }

please try it and I hope it will work. I hope this helps a little.

I figured it out myself what I did wrong. But hey! Thanks for your time Yanuar :)

Jason Anders
Jason Anders
Treehouse Moderator 145,860 Points

Why has Yanuar Prakoso answer been downvoted? The answer provided is correct for Task 1 and Task 2, and a explanation has been given. There is no reason I can see for the downvote; therefore it has be negated.

Jason ~Treehouse Community Moderator