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Start your free trialOlha Markova
2,050 PointsI get multiple errors
While trying to solve the challenge I get multiple errors. What is wrong with my code?
package com.example;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
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;
}
}
package com.example;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
import java.util.Map;
import java.util.HashMap;
import com.example.BlogPost;
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;
}
Map <String, Integer> categoryCounts = new HashMap <String, Integer>();
for (BlogPost post : mPosts){
for (String category : post.getCategoryCounts()){
Integer count = categoryCounts.get(category);
if (count == null){
count = 0;
}
count ++;
categoryCounts.put(category, count);
}
}
System.out.printf("Category counts: %s, %n", categoryCounts);
}
1 Answer
Wout Ceulemans
17,603 PointsReference: https://hastebin.com/oxaqikobup.swift
In your Blog class, starting from line 29 everything is directly put into the class. While declaring a variable there might be legal, the other statements are not (like the for loops at lines 30 & 31, their bodies and that last System.out.printf statement)
Richard Lambert
Courses Plus Student 7,180 PointsRichard Lambert
Courses Plus Student 7,180 PointsWout Ceulemans is spot on. The code you've written appears to be correct, but you need to place this within a method
getCategoryCounts()
, which returns a value of typeMap<String, Integer>
. There is no requirement to print a formatted string tostdout
.Hope this helps