Programming in Kotlin

Take a deep dive into the Kotlin language, learning about core Kotlin concepts like types, Nullables, functions, classes, and more. By Kevin D Moore.

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Part 1: Core Concepts

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Let's review what you'll be learning in this section, and why it's important.

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Install IntelliJ IDEA, then take a tour of the IDE and create the starter project you'll throughout this course.

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Review some of the core concepts of Kotlin that were covered in Your First Kotlin Android App course.

Comments 1:35
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Learn the various ways to add comments to your Kotlin code - a useful way to document your work or add notes for future reference.

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Learn about two Kotlin classes, Pair and Triple, and get tips about when you should use each of them.

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In this video, practice using the Pair and Triple classes on your own through a hands-on challenge.

Booleans 5:47
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Review the Kotlin Boolean type and try it out for yourself.

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Practice using Booleans on your own, through a hands-on challenge.

Scope 2:46
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Learn what the concept of scope means in Kotlin, and how it applies to if statements.

Conclusion 1:10
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Let's review where you are with your Kotlin core concepts, and discuss what's next.

Part 2: Flow Control

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Let's review what you'll be learning in this section, and why it's important.

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Learn how to make Kotlin repeat your code multiple times with while loops, repeat while loops, and break statements.

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Practice using while loops on your own, through a hands-on challenge.

For Loops 5:23
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Learn how to use for loops in Kotlin, along with ranges, continue, and labeled statements.

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Practice using for loops on your own, through a hands-on challenge.

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Learn how to use when expressions in Kotlin, including some of its more powerful features.

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Practice using when expressions on your own, through a hands-on challenge.

Conclusion 0:51
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Let's review what you learned in this section, and discuss what's next.

Part 3: Functions and Nullables

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Let's review what you'll be learning in this section, and why it's important.

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Write your own functions in Kotlin, and see for yourself how Kotlin makes them easy to use.

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Practice writing functions on your own, through a hands-on challenge.

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More Functions: Learn some more advanced features of functions, such as overloading, and functions as variables.

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Learn about one of the most important aspects of Kotlin development - nullables - through a fun analogy.

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Practice using Nullables on your own, through a hands-on challenge.

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Learn how to unwrap Nullables, force unwrap Nullables, and use the let statement.

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Practice working with Nullables on your own, through a hands-on challenge.

Conclusion 0:55
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Let's review where you are with your Kotlin core concepts, and discuss what's next.

Part 4: Collections

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Let's review what you'll be learning in this section, and why it's important.

Arrays 10:22
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Learn how to use arrays in Kotlin to store an ordered list of values.

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Practice using arrays on your own, through a hands-on challenge.

Lists 4:17
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Learn how to use Lists in Kotlin to store an ordered collection of data.

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Practice using Lists on your own, through a hands-on challenge.

Maps 4:45
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Learn how to use Maps in Kotlin to store a mapped collection of data.

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Practice using Maps on your own, through a hands-on challenge.

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Find out which collection you should use in a given situation.

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Learn the difference between the two types of collections.

Conclusion 0:36
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Let's review what you learned in this section, and discuss what's next.

Part 5: Lambdas

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Let's review what you'll be learning in this section, and why it's important.

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Learn the difference between lambdas and higher-order functions.

Syntax 2:26
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Learn about the syntax needed to write lambdas.

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Practice using Lambdas through a hands-on challenge.

Generics 4:13
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Find out what generics are in regards to collections.

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Practice creating Generics on your own, through a hands-on challenge.

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Learn how to use lambdas with collection methods.

Conclusion 0:51
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Let's review what you learned in this section, and discuss what's next.

Part 6: Classes

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Let's review what you'll be learning in the Classes section, and why it's important.

Creation 3:47
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Create classes using both primary and secondary constructors.

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Learn how the init method is used in Kotlin.

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Practice creating classes and understanding when to use them through a hands-on challenge.

Inheritance 15:45
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Learn about the concepts of inheritance, polymorphism, hierarchy checks, overrides, and super.

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Learn when you should subclass, and when you shouldn't.

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Find out what data classes are and how to use them.

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Practice creating your own data classes through a hands-on challenge.

Conclusion 0:49
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Let's review where you're at with your Kotlin core concepts, and discuss what's next.

Part 7: More on Classes

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Let's review what you'll be learning in this section, and why it's important.

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Learn to subclass a class and what the sealed keyword means.

Singletons 1:58
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Learn how to create static classes.

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Practice working with creating singleton classes and understanding when to use them, through a hands-on challenge.

Companion 2:58
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Create static properties of classes using the companion keyword.

Interfaces 3:37
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What's the purpose of an interface? Find out in this video!

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Practice creating your own interface, through a hands-on challenge.

Enums 4:22
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Learn what an enum is and how to use it.

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Practice creating your own enums through a hands-on challenge.

Extension 3:36
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Learn how to use Extensions to add abilities to existing classes.

Conclusion 0:33
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Let's review where you're at with your Kotlin core concepts, and discuss what's next.

Part 8: Properties and Methods

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Let's review what you'll be learning in the Properties and Methods section, and why it's important.

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Learn about getters and setters, and why you don’t need to create them in most cases.

Visibility 2:54
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Discover the different method visibility modifiers and how they affect methods.

This 3:34
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Find out what "this" is and how to use it.

LateInit 1:47
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Find out how to initialize a property later.

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Practice using LateInit in this hands-on challenge.

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Learn how delegated properties work.

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Challenge time! Practice using properties through a hands-on challenge.

Conclusion 1:55
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Congratulations, you made it through the whole course! Let's review what we've learned.