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Java Java Data Structures - Retired Organizing Data Comparable

I am Having trouble implementing comparable

How do we implement the Comparable interface, @Override public int compareTo(Object ob){return 1;} creates an error

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

import java.lang.Comparable;
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 int compareTo(Object blog){
       return 1;
  }  

  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;
  }
}

2 Answers

Seth Kroger
Seth Kroger
56,413 Points

You need to add "implements Comparable" to the class statement so it knows what interface you're overriding.

where is the class statement?

Seth Kroger
Seth Kroger
56,413 Points

It's the line that says "public class BlogPost". You put the "implements Comparable" after that and before the curly brace.

Thank you haha I forgot the whole inheritance process after my 1 month coding break XD

Thank you haha I forgot the whole inheritance process after my 1 month coding break XD

You need to add implements Comparable to class Statement to for project to recognize what interface you are Overriding