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Java Java Data Structures Organizing Data Comparable

isaac schwartzman
isaac schwartzman
963 Points

what's wrong here?

I am so confused

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;
  }
 @Override
  public int compareTo(BlogPost blogPost){
    if (this.equals(blogPost)) {
      return 1;
    } 

    int compareDate = mCreationDate.compareTo(blogPost.mCreationDate);
    return compareDate;
  }

  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;
  }
}
Marcus Yow
Marcus Yow
12,929 Points

Your equals condition should return 0 and not 1.

isaac schwartzman
isaac schwartzman
963 Points

when I make it 0 it gives me ./com/example/BlogPost.java:19: error: method does not override or implement a method from a supertype @Override ^ 1 error

2 Answers

Marcus Yow
Marcus Yow
12,929 Points

That's because the compareTo method takes an object from the super class Object as a parameter, and in order to properly override a method you need to include the correct parameter types.