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Java Java Data Structures - Retired Organizing Data Comparable

john specter
john specter
1,025 Points

interfaces in java problems ---help!!

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....plz i need help with this.this is how far av gone

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(String result == blog.compareTo(obj)){
    return result;
    }
  }
}

5 Answers

Hi John,

You've done most of that correctly; however, the instructions at this point are to just have the method return 1; the int you've specified; your method is returning a string based on an if condition. You just need:

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

Subsequent tasks develop this further.

I hope that helps.

Steve.

Harrison Cassedy
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Harrison Cassedy
Java Web Development Techdegree Graduate 12,031 Points

This is the answer I got to pass through part:1 (please upvote if this helped you)

  @override
  public int compareTo(Object obj){

    if(String result == blog.compareTo(obj)){
    return result;
    }
  }

Good - excellent! I hope you get through the next stages - shout if you need a hand. :+1:

Harrison Cassedy
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Harrison Cassedy
Java Web Development Techdegree Graduate 12,031 Points

Its being weird and not showing the entirety of my code.

 public int compareTo(Object obj) {
    BlogPost other = (BlogPost) obj;
    if (equals(other)) {
      return 0;
    }
    int dateCmp = mCreationDate.compareTo(other.mCreationDate);
    if (dateCmp == 0) { 
    }
    return 1;
  }

l am confused and failing to get the right code for that question;