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Java Java Data Structures - Retired Efficiency! Changing Course

What am I doing wrong?

I'm so confused

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.ArrayList;
import java.util.TreeMap;
import java.util.Map;
import java.util.Arrays
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.getVideos().add(1, video);
  }

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

  }

  public Map<String, Video> videosByTitle(Course course) {
   Map<String, Video> byTitle = new TreeMap<String, Video>();
    ArrayList<Video> courseList = new ArrayList<Video>();
    courseList.add(course);
    for(Video video : courseLIst) {
      byTitle.put(video.getName(), video);
    }
    return byTitle;
  }

}

1 Answer

Hi Emily,

There's no requirement of an ArrayList named courseList. Simply parse through each video from the list of videos using course.getVideos()-returns a list of videos and add them to the map.

for(Video video:course.getVideos()){
byTitle.put(video.getName(),video);
}

Hope this helps!!