How do I do this Challenge??

Hey Gabriel,

I'll break this challenge down for you. (1) so you successfully created a vid object but now you have to add it to a Course. If you look at the Course.java file, you can see that it just contains a string as a title and a list of Videos. Basically what we want to do is add our vid object to that list of Videos which is in a Course object.

Craig wrote that I'm going to pass in this course to the addForgottenVideo method. in the addForgottenVideo you can see that it has a Course object as a parameter. that means we can simply use a method of that course object that will allow us to get the list of the videos and then add our video. It has a method called getVideos() which returns a list of the videos. Then we can chain it with the method .add(1, video). there is a 1 (index based) there because in the todo it says ** TODO(2): Add the newly created video to the course videos as the second video.**. The solution is below if your still confused.

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

(2) For this, we want to loop through the video list in the course object that Craig will pass in. First instantiate a new Map. Using the same method as above, we want to get all the videos from the course object. We then loop through that and save it as a Video object. Then inside the loop, get the title of each video and store it as a string. Finally place that title as the fire parameter of the map and the current video we're looping as the second parameter of the map. In case it's still confusing there is the solution below.

public Map<String, Video> videosByTitle(Course course) {
    Map<String, Video> vidMap = new TreeMap<>();
    for (Video currentVids : course.getVideos()) {
        String title = currentVids.getTitle();
         vidMap.put(title, currentVids);
    } 

    return vidMap;
  }

(3) for this, we just simply loop through each video object. we call the getTitle() method each time it loops and check if it equals our "oldTitle" string that we pass in. If they equal each other, then use the setTitle() method to change the title to the "newTitle" string.

for (Video videos : course.getVideos()) {
      if (videos.getTitle() == oldTitle) {
       videos.setTitle(newTitle); 
      }
    }

I hope that helped and dont forget to mark as best answer so others can see this as well.

Happy coding,

Kevin