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Java Java Data Structures - Retired Organizing Data Comparable

Posted by Admire Dhodho
Admire Dhodho
5,411 Points

Help me on this one i am mixing things up

Let's allow our BlogPost to be sorted. In this first step, just make the class implement Comparable interface, and produce a compareTo method that accepts an object as a parameter. Have it always return 1 for this first step, we'll do more in the next step.?

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

import java.util.Date;

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

  public String getAuthor() {
    return mAuthor;
  }

  public String getTitle() {
    return mTitle;
  }

  public String getBody() {
    return mBody;
  }

  @override
  public int campareTo(Object obj){
    BlogPost other = (BlogPost) obj;
    return 1;
  }

  public String getCategory() {
    return mCategory;
  }

  public Date getCreationDate() {
    return mCreationDate;
  }
}
Dumitru Petrov
Dumitru Petrov
908 Points

You write "campareTo" instead of "compareTo"

5 Answers

Alex Stephens
Alex Stephens
13,342 Points
Alex Stephens
Alex Stephens
13,342 Points

hello i have just done the first part of the code challenge but in my code am not using @Override in my code but i still pass the code challenge why is it letting me pass without @Override ? here is my code

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;
  }

  public int compareTo(Object obj) {
    BlogPost other = (BlogPost) obj; 
    return 1;
  }  
}
Admire Dhodho
Admire Dhodho
5,411 Points

its because your code is correct but later in the next stages it might tell you that the test 1 is no longer passing

Allan Clark
Allan Clark
10,810 Points
Allan Clark
Allan Clark
10,810 Points

Check out this post i made on another forum question. Let me know if there is anything else I can clear up.

https://teamtreehouse.com/forum/understanding-the-concept

Admire Dhodho
Admire Dhodho
5,411 Points

/com/example/BlogPost.java:24: error: method does not override or implement a method from a supertype @Override

Craig Dennis
STAFF
Craig Dennis
Treehouse Teacher
Craig Dennis
Craig Dennis
Treehouse Teacher

Try changing @override to @Override. Case matters.

Also, @Override doesn't belong on getWords, just on compareTo.

Hope it helps!

Admire Dhodho
Admire Dhodho
5,411 Points

/com/example/BlogPost.java:24: error: method does not override or implement a method from a supertype @Override its giving me this error Found out that i heard forgoten to implement the comparable from the class BlogPost . Thanx a lot craig

Schwartz Prince
Schwartz Prince
Courses Plus Student 2,132 Points
Schwartz Prince
Schwartz Prince
Courses Plus Student 2,132 Points

Hi, Is that necessary to write @Override in the code? What will happen if we not writing the same in the code? Please explain

Matt Bloomer
Matt Bloomer
10,608 Points
Matt Bloomer
Matt Bloomer
10,608 Points

I copied and pasted the answer above, and the error message said that the class needs to implement the Comparable method; what exactly is it asking me to do?

Craig Dennis
Craig Dennis
Treehouse Teacher
Craig Dennis
Craig Dennis
Treehouse Teacher 
// Assuming the 'implements Comparable' portion
public class BlogPost implements Comparable {
//...
}
Casey Huckel
PLUS
Casey Huckel
Courses Plus Student 4,257 Points
Casey Huckel
Casey Huckel
Courses Plus Student 4,257 Points

I get 5 errors from this:

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 compareTo(Object object) { BlogPost other = (BlogPost) obj; return 1; } }