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Java Java Data Structures - Retired Organizing Data Comparable

Posted by Kumar Swamy
Kumar Swamy
Courses Plus Student 1,324 Points

Getting an error "cannot find symbol". please suggest

stuck on last task out of 3

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){
    obj = (BlogPost) obj;
    if(equals(obj)){
    return 0;
    }

   // return mCreationDate;
   // }
  //return obj.mCreationDate;
     return mCreationDate.compareTo(obj.mCreationDate);
  }
}

1 Answer

Steve Hunter
Steve Hunter
57,712 Points
Steve Hunter
Steve Hunter
57,712 Points

I took a different route to you on this one. My code looks like:

  public int compareTo(Object obj){
    BlogPost bp = (BlogPost) obj;
    if (bp.equals(this)){
      return 0;
    }
    if(this.mCreationDate.before(bp.mCreationDate)){
      return -1; 
    }
    return 1;
  }

If I was to hazard a guess where your symbol iss ue is coming from, it is at the mCreationDate point - I think you need an object before it. Using this or obj would do it.

Steve.

Kumar Swamy
Kumar Swamy
Courses Plus Student 1,324 Points

Thanks for the explanation steve...

Steve Hunter
Steve Hunter
57,712 Points

No problem! Glad to help.