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Java Java Data Structures Efficiency! Changing Course

QuickFix.java Adding to LinkList?

I looked an a similar answer, but I'm not sure how I to add the title to a non-local LinkList?

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.Map;
import java.util.LinkedList;

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");
    // TODO(2):  Add the newly created video to the course videos as the second video.
    LinkedList<Video> vid = new LinkedList<>();
    vid.addAll(course.getVideos());
    vid.add(video);

  }

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

  }

  public Map<String, Video> videosByTitle(Course course) {
    return null;
  }

}

2 Answers

I was close. Thank you!

Florian Tรถnjes
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.a{fill-rule:evenodd;}techdegree seal-36
Florian Tรถnjes
Full Stack JavaScript Techdegree Graduate 50,856 Points

Hey Shaun,

you can get a reference to the video list of the course object using its 'getVideos' getter method. Then you can simply add another video to it using the 'add' method.

[...]
  public void addForgottenVideo(Course course) {
    // TODO(1):  Create a new video called "The Beginning Bits"
    Video video = new Video("The Beginning Bits");
    // TODO(2):  Add the newly created video to the course videos as the second video.
    course.getVideos().add(1, video);
[...]
  }

Regards, Florian