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Java Java Data Structures - Retired Exploring the Java Collection Framework ArrayLists

Arun Shivaramakrishna
Arun Shivaramakrishna
4,771 Points

Error in ArrayList implementation

Unable to locate the error. Could someone check the code and please let me know!

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

import java.io.Serializable;
import java.util.Date;
import java.util.Arrays;

public class BlogPost implements Comparable<BlogPost>, Serializable {
  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 int compareTo(BlogPost other) {
    if (equals(other)) {
      return 0;
    }
    return mCreationDate.compareTo(other.mCreationDate);
  }

  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 List<String> getExternalLinks() {
    return getResult("http");
  }

  public List<String> getResult(String http){
    List<String> newLinks = new ArrayList<String>();
    for (String checkLink : getWords()) {
    if (checkLink.startsWith(http)) {
      newLink.add(checkLink);
    }
    }
   return newLinks;
  }
}

3 Answers

Jon Kussmann
PLUS
Jon Kussmann
Courses Plus Student 7,254 Points
 if (checkLink.startsWith(http)) {
      newLink.add(checkLink);
    }

Should be (you were missing an 's'):

 if (checkLink.startsWith(http)) {
      newLinks.add(checkLink);
    }
Arun Shivaramakrishna
Arun Shivaramakrishna
4,771 Points

I made that change. Guess still there are a few more corrections needed.

Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points

You are missing a couple of import statements. Let me know if you can't figure out which ones.

Arun Shivaramakrishna
Arun Shivaramakrishna
4,771 Points

Oh you were Right! Thanks a lot for the help!