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Java Java Data Structures Organizing Data Comparable

Jarvis Chandler
Jarvis Chandler
7,619 Points

Where is the mistake i cant find it

Where is the mistake i cant find It

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;
  }

public int compareTo(Object obj) {
     if (this.equals(obj)){
      obj = (BlogPost)obj;
      return 0;
    }
        return mCreationDate.compareTo(blogpost.mCreationDate);
    }
  }

2 Answers

Jarvis, good start, but it's probably best to create a new variable for the result of the cast, and you need to finish the if... else... Note that the second return statement replaces the return 0:

  public int compareTo(Object obj) {
    BlogPost other = (BlogPost) obj;
    if (equals(other)) {
      return 0;
    } else {
      return mCreationDate.compareTo(other.mCreationDate);
    }
  }
Jarvis Chandler
Jarvis Chandler
7,619 Points

Thank you i was stuck on it for along time