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Java Java Data Structures - Retired Efficiency! Changing Course

Kenzo Qui
Kenzo Qui
2,350 Points

Error Message: Expected map to contain 23 keys but it contained 1

The import of hashMap wasn't there in the first place, I added tit. I try different solutions but it was either a an exception or like this error message. I need help with the videosByTitle() method by in QuikFix.java. I believe also that the reason it only makes one item is that it is the same key and I don't know how to fix that, I just set it to what I thought what was expected ( course.getName() ).

com/example/model/Course.java
package com.example.model;

import java.util.List;

public class Course {
  private String mName;
  private List<Video> mVideos; 

  public Course(String name, List<Video> videos) {
    mName = name;
    mVideos = videos;
  }

  public String getName() {
    return mName;
  }

  public List<Video> getVideos() {
    return mVideos;
  }

}
com/example/model/Video.java
package com.example.model;

public class Video {
  private String mTitle;

  public Video(String title) {
    mTitle = title;
  }

  public String getTitle() {
    return mTitle;
  }

  public void setTitle(String title) {
    mTitle = title;
  }

}
QuickFix.java
import com.example.model.Course;
import com.example.model.Video;

import java.util.HashMap;
import java.util.Map;

public class QuickFix {

  public void addForgottenVideo(Course course) {
    // TODO(1):  Create a new video called "The Beginning Bits"

    // TODO(2):  Add the newly created video to the course videos as the second video.

    Video video = new Video("The Beginning Bits");
    course.getVideos().add(1, video);
  }

  public void fixVideoTitle(Course course, String oldTitle, String newTitle) {

  }

  public Map<String, Video> videosByTitle(Course course) {
    Map<String, Video> officialCourse = new HashMap<String,Video>();
    for (Video videos : course.getVideos()) {
      officialCourse.put(course.getName(), videos);
    }
    return officialCourse;
  }

}

1 Answer

Craig Dennis
STAFF
Craig Dennis
Treehouse Teacher

Whoops! So close, the method is video.getTitle not course.getName.

The preview tab should show you the error.

Let me know if that isn't it! Stick with it!

Kenzo Qui
Kenzo Qui
2,350 Points

Wow, thank you. I am not that good yet with understanding an application someone else programmed.