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Java Java Data Structures - Retired Efficiency! Changing Course

Changing Course

Error :

./QuickFix.java:12: error: cannot find symbol course.add(1, video); ^ symbol: method add(int,Video) location: variable course of type Course 1 error

I don't see what the problem is because that is how you add to a list on a specific spot. So what is the problem?

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;

public class QuickFix {

  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.add(1, video);
  }

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

  }

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

}
Miguel Rivas
Miguel Rivas
4,902 Points

Hi Kenneth, try importing the list at the beginning of the method 'addForgottenVideo' that Craig made for you.

That way you have a list to add it, right now I believe you are not using any list.

//add this:
List<Video> videoList = course.getVideos();

// 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.add(1, video);

Edit: sorry, you can't add a video to a 'course' list, you need to add it to a videoList, fix that also:

videoList.add(1,video);

PS: don't forget your imports:

import java.util.List;

Have a great day.

M.