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Java Java Data Structures Exploring the Java Collection Framework ArrayLists

Aaron Coursolle
Aaron Coursolle
18,014 Points

[Solved]Code not passing

See my code below:

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

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
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 List<String> getWords() {
    String[] words= mBody.split("\\s+");
    return Arrays.asList(words);
  }

  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 getWordsPrefixedWith("http");
 }

 private List<String> getWordsPrefixedWith(String prefix) {
 List<String> results = new ArrayList<String>();
   for (String word : getWords()) {
     if (word.startsWith(prefix)) {
       results.add(word);
     }
   }

  return results; 
 }
Aaron Coursolle
Aaron Coursolle
18,014 Points

Solved. Missing Closing brace and "getWordsPrefixWith" was spelled wrong.

1 Answer

Dennis Addo
PLUS
Dennis Addo
Courses Plus Student 2,943 Points
you have to write the methode in public List<String> getExternalLinks() and everything will work.
You did great, it was just the separation that was a problem.




package com.example;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
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 List<String> getExternalLinks() {
    List<String> results = new ArrayList<String>();
   for (String word : getWords()) {
     if (word.startsWith(prefix)) {
       results.add(word);
      }
   }

  return results; 
 }

 public Date getCreationDate() {
    return mCreationDate;
  }
}