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Java Java Data Structures - Retired Organizing Data Comparable

Devin Scheu
Devin Scheu
66,191 Points

Java help

Question: 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.

Code:

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 compareTo(Object obj) {
    return 1;
  }

  public String getCategory() {
    return mCategory;
  }

  public Date getCreationDate() {
    return mCreationDate;
  }
}

3 Answers

Rob Bridges
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Rob Bridges
Full Stack JavaScript Techdegree Graduate 35,467 Points

Hey there Devin,

All that I can see so far is that you forgot to do the @Override statement above your compareTo

Everything else looks good.

Try

  @Override
  public int compareTo(Object obj) {
    return 1;
  }

This solution is what I got too, but the editor message says that the method does not override or implement a method from a supertype? What exactly am I doing wrong?

Rob Bridges
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Rob Bridges
Full Stack JavaScript Techdegree Graduate 35,467 Points

Hey Matt, do you have the @Override implementation before the method, and did you call the method CompareTo and have it accept an object?

Yes, I did have that.

André Møller
André Møller
913 Points

@Override public int compareTo(Object obj) { return 1; }