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Start your free trialJames N
17,864 PointsThey tell me to loop over all the posts...
But, what they don't tell me is what the variable with all the posts is called! :'(
Thanks for your help!
My BlogPost.java
code:
package com.example;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.HashMap;
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 List<String> getExternalLinks() {
List<String> links = new ArrayList<String>();
for (String word : getWords()) {
if (word.startsWith("http")) {
links.add(word);
}
}
return links;
}
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 Map<String, List<BlogPost>> getCategoryCouts() {
Map<String, List<BlogPost>> BlogPostsByCategory = new HashMap<String, List<BlogPost>>();
for (BlogPost post : blogPosts) {
List<BlogPost> CategorizedBPs = BlogPostsByCategory.get(post.getCategory());
if (CategorizedBPs == null) {
CategorizedBPs = new ArrayList<BlogPost>();
BlogPostsByCategory.put(post.getCategory(), CategorizedBPs);
}
CategorizedBPs.add(post);
}
}
}
My Blog.java
code:
package com.example;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
public class Blog {
List<BlogPost> mPosts;
public Blog(List<BlogPost> posts) {
mPosts = posts;
}
public List<BlogPost> getPosts() {
return mPosts;
}
public Set<String> getAllAuthors() {
Set<String> authors = new TreeSet<>();
for (BlogPost post: mPosts) {
authors.add(post.getAuthor());
}
return authors;
}
}
1 Answer
Jennifer Nordell
Treehouse TeacherHi there! Sure they do! Take a look at this line:
List<BlogPost> mPosts;
This is a list of of type BlogPost. Hope this helps!
James N
17,864 PointsJames N
17,864 PointsOh. in the blog class. (-_Q) duh. Thanks for your help! forgot to put the code in the blog class.......
James N
17,864 PointsJames N
17,864 PointsI still have a problem with the code, however. even after moving it to the blog class, i get the following message directly from that top bar:
Bummer! Uh oh. java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl cannot be cast to java.lang.Class
UPDATED CODE; BLOG.JAVA
MY UPDATED CODE; BLOGPOST.JAVA