Excellent course, packed with relevant content and useful hands on Kotlin exercises with great feedback based on Coursera provided unit tests. Looking forward to more Coursera courses from JetBrains.
This course is a very comprehensive and detailed introduction to Kotlin. However, it would be even better if it could include the generics part which is the most difficult but quite frequently used.
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By Michael S•
I enjoyed this course. It gives a pretty good view into the more useful parts of the language and definitely makes a great case for a Java developer to become a Kotlin convert. My only complaints about this course are in regard to the GameOfFifteen assignment. The README on what they are looking for points to a web version of the game and basically says to implement an isEven function to check if a permutation is solvable and then implement the game interface to get everything working. The problem is this: I implemented my game just the way the web game works - specifically, my game chose a random cell to be the empty cell upon initialization, just as the web game did. I also set up my "hasWon" state to be the case where the numbers are in order AND the empty cell is in the bottom-right position, just as the web game seemed to be showing. When I ran the tests on my project, they failed. I had to do a debug deep dive to find that the tests are expecting that hasWon can be true regardless of the position of the empty cell, as long as the numbers are in order and to find that the tests expect the game to always initialize with the empty cell in the bottom-right position. It was easy enough to fix my game to match their tests rather than the example game, but I lost some time unnecessarily to this. It would probably be helpful to others who take this course if a couple simple notes in the README were added to indicate that the game should initialize with the empty cell in the bottom-right position and that the game is won if the cells are in ascending numerical order regardless of the position of the empty cell.
By Stephen P•
Overall, great course that accomplishes what it promises. I learned how to develop in Kotlin relying on already knowing Java. Pros: The videos are clear and concise, with high "signal-to-noise ratio". Tests during the videos were on point and exposed common misconceptions people commonly have when learning Kotlin. The solution videos after completing the weekly projects were helpful in making working code more efficient and readable. Cons: The instructions for Week 3 incorrectly specified what was required, leading me on a wild goose chase for several hours. There were only solution videos for weeks 1 to 3. It appears nobody monitors the discussion forums anymore. There's questions asked 2 years ago with many "me too"s, but no response from staff.
By Josep G F•
I liked this course but to be honest, I found that the assignments were a little difficult to understand due to the concepts they were related with. The last assignment related to the Fifteen game, it was a little complicated to understand how to get the parity of a permutation. Situations like this made the exercise a little frustating because I understood the Kotlin concepts but it wasn't enough to finish the assignments. Probably like in the real life problems :)
Just wanted to let you know, just in case can help in some way to improve the way how the assignments are provided. Maybe explain a little further about some extra concepts or something else.
Thank you for this great course!
By Alexander L•
In terms of provided content this course is great. Provided knowledge is definitely useful for almost any Java developer. Content is greatly structured, assigments are pretty cool.
Hovewer, there is some problems with presenting and plaform: Sometimes speaker is too slow (My usual speed on this course is 1.75x) and mumble. Subtitles also not helping (at least in weeks 4-5 when I listening them). Kotlin Playground can be marked as completed only on second attempt for some reason.
Problems are not critical, so I still recomend this course.
By Pablo V•
The course was very interesting, however, I have to say that most of the knowledge I gained it in other places like stackoverflow website. I also consider that the course was a bit hard to catch if you are not practicing Kotlin day to day. I have been studying Kotlin as an Android developer for about 3 months and some stuff were difficult to understand, I guess a person with zero experience would have pulled his hair out. As another feedback, I would have liked being more close with the staff.
By Adedimeji S•
The course was well delivered and filled with useful tasks and assignments which really helped drive home the concepts being taught. Most importantly, I've gone from being unsure about how to handle the sheer amount of differences between Kotlin and Java to being comfortable using Kotlin and willing to explore more of its features. The only drawback from the course delivery was the slight difficulties in understanding the presenter, but those were largely minimal issues.
By Dmitry S•
I'd rate that high because of it's assignment system. If you pass the tests provided by the edutools plugin, you are pretty sure, you will submit. This also gives a much deeper insight on the corner cases for your algorithm.
The last assignment GameOf15 was a bit tricky though. I am specifically referring to canMove method - it's not clear at all from the task, how to implement or why would you even need that - so I just made it return true all the time
By Dave G•
the videos interspersed with quizzes are a really good way to learn. The challenges are really good, but it would be nice to see video solutions for the final ones. The descriptions of some of the tasks need some work - there are plenty of suggestions in the forum so I won't add any more here. The video content is excellently presented and well paced. Display on a mobile device with a small screen is a bit lame, especially for the (later) playgrounds.
By umberto a•
Course is too much difficult. Assignement times for exercises are not real. I spent triple time to do that. I think that it is an advanced course and not not a beginner/medium as they say. I'm a java android developer, and do not use lambda expressions or functional programming that is required to know. Anyway it gives the basics of Kotlin going to dig the examples. Teachers are very professional and skilled.
By Ignazio C•
The content of the course is definitely valid. It gives a nice overview of the Kotlin language. The title is "for Java developers" but only a basic knowledge of java is required. The only slightly negative aspect are on my opinion the assignments: sometime are not clear enough and the ones for week4 and week5 could have been easier with a different object definition
By Yanbo H•
It's a pretty nice course for people who have already know some object-oriented programming languages.
You can quickly understand what is the new features compared with Java and why Kotlin was designed like this way. The thing I like most is that it showed what is compiled in the bytecode level, which helped me a lot in understanding what is going on under the hood.
By Wan Y•
A very pragmatic course for those who have some experience in Java. This course covers several important features of Kotlin, alongside some high quality assignments to test your understanding. The only downside is that the lecturer speaks too fast sometimes and the subtitle is far from accurate. For non-native speakers, it might take some time to get accustomed to.
By Slava K•
The course covers most of the important topics and gets into advanced areas of knowledge.Most of them are well explained with very good examples.As other stated, I think many of the home assignments miss the point of practicing Kotlin topic by concentrating on algorithmic issues, I would change them to be more like the playground tasks.
By Robert G•
Great course, great structure + exercises.
Minor thing: The English needs some improvement - it's quite hard to follow sometimes, and sometimes even the transcript fails (I read "[unintelligible]" one time).
So much new stuff... but you managed to get this into this short course, and even I took something away from it - kudos!
By Michael O•
Sometimes difficult to understand instructor, but that is as much me as the course. Some of the examples are not left on the screen long enough to digest, or even long enough to realize I need to pause the video in order to examine them thoroughly, before moving on to the next thing. Requires annoying moving around the video.
By Adil S•
Great for beginners.. Some things that can be improved
1) The compiler used to check the test assignments need to be upto date. Personally I had to change the code multiple times and resubmit it since I was working with Kotlin 1.4 and the compiler used to run and check the test in coursera was of a lower version.