Build Spring Boot Apps with the Kotlin Programming Language from Udemy

What's inside

Learning objective

Build fully functional, robust and efficient applications with spring boot and the kotlin programming language

Syllabus

What is Kotlin, and why Java developers should consider using it. Installing and configuring IntelliJ

What is Kotlin

Configuring and installing IntelliJ

How to get support while you're taking this course

Declaring strings, mutable and immutable varaibles, string templates and multi-line strings

Creating a new project in Kotlin

Creating a Kotlin hello world project - just to check everything is working

The syntax of declaring a variable - the var and val keywords

Inferring variable types

Using String templates

Creating a string with multiple lines

Workign with integers, doubles, bigdecimals etc. Assigning values to variables. Casting and smart casting

Using the Double data type, and determining class types in Kotlin

The Int data type

Other data types

Casting from one data type to another - the Java version

Casting from one data type to another - the Kotlin version

Chapter review - what we have learned in this chapter

What happens when variables can contain the value null.

Creating variables that can contain the value null

Running methods which work with nullable variables

The null-safe operator

The non-null asserted operator

The nothing object type

Defining function signatures and single expression functions

The function syntax, and the Unit object

Creating and calling top level functions

Single expression functions

Using named parameters when calling functions

Using optional parameters in functions

Parameter attributes are always immutable

Functions within a function

Functions that take a lambda parameter

Creating classes - the general class and the data class. Revisiitng val and var. Class attribute visibility and primary and secondary constructors

Project structure and packages

The class declaration, and adding attributes

Instantiating a class, and accessing the class attributes

Creating a simple constructor

Adding secondary constructors to a class

Alternative class design

Overriding getters and setters

Creating a dummy variable get method

Functions within a class

Overriding functions

Creating static functions

Data classes

Destructuring and ComponentN functions

Practicing what we have learned - converting some Java code to Kotlin

The challenge - explaining the Java code

Solution walkthrough

If, when, and object equality

The if keyword as an expression in kotlin

Assigning a variable using an if expression

Assigning values using if to do a null-safe check

The Elvis operator

Using the Elvis operator to overcome null-safe check smart cast compiler warning

The let function

Object equality

The when expression

The for and while loops and the range object type

The while loop

Using for to loop through a collection

Destructuring with a for loop

Looping with the Range object

Creating different types of ranges

Arrays, mutable and immutable collections

Mutable arrays with immutable variable assignments

Creating an immutable list

Creating a mutable list

Creating maps and sets

Working with Arrays in Kotlin

Practicing what we have learned

The challenge - explaining the requirements

How exceptions work in kotlin, try as an expression, and the use method

All exceptions in Kotlin are unchecked

Throwing exceptions

Try as an expression

Using the use expression to ensure resoruces are always closed

Unit testing with Junit

Using Junit with Kotlin

The Kotlin test assertions

Testing for exceptions

Inheritance and adding functions to a class (extension functions) - also creating custom exception classes.

Creating and implementing Interfaces

Class inheritance

Inheriting from classes with constructors

Implementing multiple interfaces

Creating custom exceptions

Adding functions to existing classes (extension functions)

Calling Kotlin code from Java

Providing values to non-nullable variables

Using data classes

Using immutable lists

Exception handling

Using static functions

Importing a Kotlin jar into a Java project

Starting an application and building a controller and a web page

Creating the project using the Spring Initializer

A hello world controller

Good to know

Know what's good

, what to watch for

, and possible dealbreakers

Useful for Java developers to sharpen their language and skillset

Focuses on Kotlin to develop full stack Spring Boot applications

Taught by Matt Greencroft and Virtual Pair Programmers, who have experience in Kotlin development

Has a structured curriculum that covers various aspects of Kotlin and Spring Boot development

Suitable for existing Spring Framework Java developers who want to transition to Kotlin

Reviews summary

Kotlin course for spring boot beginners

According to students, this course is an accessible introduction to using Kotlin for Spring Boot with engaging assignments. The course starts by reviewing the basics of the Kotlin programming language. The lectures then provide a quick introduction to Spring Boot. Students who are learning Kotlin for the first time may find this course especially useful.

Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in Build Spring Boot Apps with the Kotlin Programming Language with these activities:

Create a Kotlin hello world project

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Creating a very simple hello world project will help you setup your development tools and verify they are installed and working correctly as well as ensure that you are comfortable with the IDE

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Open your IDE of choice (e.g. IntelliJ)
Create a new Kotlin project
In the main function, write the code to print "Hello world" to the console
Run the project

Watch a tutorial on Kotlin variable assignment

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Following a guided tutorial on variable assignment will help you understand how variables are declared and how they can be assigned values in Kotlin.

Browse courses on Variable Assignment

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Find a tutorial on Kotlin variable assignment
Watch the tutorial and take notes on the key concepts
Try out the concepts you learned in your own code

Practice writing Kotlin code to create and manipulate variables

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Practicing writing Kotlin code to create and manipulate variables will help you reinforce your understanding of the material and improve your programming skills.

Browse courses on Variable Assignment

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Create a new Kotlin file
Declare several variables of different data types
Assign values to the variables
Print the values of the variables to the console

Four other activities

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Show all seven activities

Participate in a peer session to discuss Kotlin exception handling

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Participating in a peer session to discuss Kotlin exception handling will allow you to learn from others and share your own knowledge. This will help you to better understand the material and improve your programming skills.

Browse courses on Exception Handling

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Find a peer session or study group that is focused on Kotlin exception handling
Attend the session and actively participate in the discussion
Share your own knowledge and experiences with exception handling

Write a blog post about your experience learning Kotlin

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Writing a blog post about your experience learning Kotlin will help you to reflect on what you have learned and share your knowledge with others. This will help you to better understand the material and improve your writing skills.

Browse courses on Kotlin

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Choose a topic for your blog post
Write an outline for your post
Write the first draft of your post
Edit and revise your post
Publish your post

Contribute to an open-source Kotlin project

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Contributing to an open-source Kotlin project will allow you to learn from others and share your own knowledge. This will help you to better understand the material and improve your programming skills.

Browse courses on Kotlin

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Find an open-source Kotlin project that you are interested in
Read the project's documentation
Start working on a small contribution
Submit a pull request to the project

Mentor a junior developer who is learning Kotlin

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Mentoring a junior developer who is learning Kotlin will allow you to share your knowledge and help others to grow. This will help you to better understand the material and improve your communication skills.

Browse courses on Kotlin

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Find a junior developer who is interested in learning Kotlin
Set up a regular meeting time
Create a learning plan
Provide feedback and support

Career center

Learners who complete Build Spring Boot Apps with the Kotlin Programming Language will develop knowledge and skills that may be useful to these careers:

Software Engineer

This course will help you become a Software Engineer. Kotlin is increasingly used by companies such as Pinterest, Google, Netflix, and Coursera. As the adoption of Kotlin increases, the demand for Software Engineers who are proficient in the language will grow. This course will teach you fundamental Kotlin concepts, such as declaring variables, using control flow, and working with objects and classes. You will also learn how to use Kotlin to build web applications with Spring Boot.

See salaries and explore the career path for Software Engineer

Full-Stack Developer

This course will help you become a Full Stack Developer. Full Stack Developers use programming languages to build both the front-end and back-end of web applications. Kotlin is a modern programming language that is well-suited for developing full stack applications. It is concise, easy to read, and has a number of features that make it a good choice for full stack development, such as its support for both front-end and back-end development. This course will teach you the fundamentals of Kotlin and how to use it to build full stack applications with Spring Boot.

See salaries and explore the career path for Full-Stack Developer

Web Developer

This course will help you progress as a Web Developer. Kotlin is a modern programming language that is well-suited for developing web applications. It is concise, easy to read, and has a number of features that make it a good choice for web development, such as its support for lambdas and its null safety features. This course will teach you the fundamentals of Kotlin and how to use it to build web applications with Spring Boot.

See salaries and explore the career path for Web Developer

Backend Developer

This course will help you become a Backend Developer. Backend Developers use programming languages to build the server-side of web applications. Kotlin is a modern programming language that is well-suited for developing backend applications. It is concise, easy to read, and has a number of features that make it a good choice for backend development, such as its support for concurrency and its null safety features. This course will teach you the fundamentals of Kotlin and how to use it to build backend applications with Spring Boot.

See salaries and explore the career path for Backend Developer

DevOps Engineer

This course may be useful for DevOps Engineers. DevOps Engineers use programming languages to automate the software development process. Kotlin is a modern programming language that is well-suited for developing DevOps tools. It is concise, easy to read, and has a number of features that make it a good choice for DevOps, such as its support for concurrency and its null safety features. This course will teach you the fundamentals of Kotlin and how to use it to build DevOps tools.

See salaries and explore the career path for DevOps Engineer

Cloud Engineer

This course may be useful for Cloud Engineers. Cloud Engineers use programming languages to build and deploy cloud applications. Kotlin is a modern programming language that is well-suited for developing cloud applications. It is concise, easy to read, and has a number of features that make it a good choice for cloud development, such as its support for concurrency and its null safety features. This course will teach you the fundamentals of Kotlin and how to use it to build cloud applications.

See salaries and explore the career path for Cloud Engineer

Technical Writer

This course may be useful for Technical Writers. Technical Writers use programming languages to write documentation for software and hardware products. Kotlin is a modern programming language that is well-suited for writing technical documentation. It is concise, easy to read, and has a number of features that make it a good choice for technical writing, such as its support for code snippets and its null safety features. This course will teach you the fundamentals of Kotlin and how to use it to write technical documentation.

See salaries and explore the career path for Technical Writer

Security Engineer

This course may be useful for Security Engineers. Security Engineers use programming languages to build and deploy security systems. Kotlin is a modern programming language that is well-suited for developing security systems. It is concise, easy to read, and has a number of features that make it a good choice for security development, such as its support for concurrency and its null safety features. This course will teach you the fundamentals of Kotlin and how to use it to build security systems.

See salaries and explore the career path for Security Engineer

Systems Analyst

This course may be useful for Systems Analysts. Systems Analysts use programming languages to analyze and design computer systems. Kotlin is a modern programming language that is well-suited for developing systems analysis tools. It is concise, easy to read, and has a number of features that make it a good choice for systems analysis, such as its support for concurrency and its null safety features. This course will teach you the fundamentals of Kotlin and how to use it to build systems analysis tools.

See salaries and explore the career path for Systems Analyst

Mobile Developer

This course may be useful for Mobile Developers. Mobile Developers use programming languages to build mobile applications. Kotlin is a modern programming language that is well-suited for developing mobile applications. It is concise, easy to read, and has a number of features that make it a good choice for mobile development, such as its support for Android development. This course will teach you the fundamentals of Kotlin and how to use it to build mobile applications.

See salaries and explore the career path for Mobile Developer

Data Scientist

This course may be useful for Data Scientists. Data Scientists use programming languages to analyze data and build models. Kotlin is a powerful programming language that can be used for a variety of data science tasks, such as data cleaning, data analysis, and machine learning. This course will teach you the fundamentals of Kotlin and how to use it for data science tasks.

See salaries and explore the career path for Data Scientist

Blockchain Developer

This course may be useful for Blockchain Developers. Blockchain Developers use programming languages to build and deploy blockchain applications. Kotlin is a modern programming language that is well-suited for developing blockchain applications. It is concise, easy to read, and has a number of features that make it a good choice for blockchain development, such as its support for concurrency and its null safety features. This course will teach you the fundamentals of Kotlin and how to use it to build blockchain applications.

See salaries and explore the career path for Blockchain Developer

Machine Learning Engineer

This course may be useful for Machine Learning Engineers. Machine Learning Engineers use programming languages to build and deploy machine learning models. Kotlin is a powerful programming language that can be used for a variety of machine learning tasks, such as data preprocessing, feature engineering, and model training. This course will teach you the fundamentals of Kotlin and how to use it for machine learning tasks.

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Data Engineer

This course may be useful for Data Engineers. Data Engineers use programming languages to build and deploy data pipelines. Kotlin is a modern programming language that is well-suited for developing data pipelines. It is concise, easy to read, and has a number of features that make it a good choice for data engineering, such as its support for concurrency and its null safety features. This course will teach you the fundamentals of Kotlin and how to use it to build data pipelines.

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Game Developer

This course may be useful for Game Developers. Game Developers use programming languages to build video games. Kotlin is a modern programming language that is well-suited for developing video games. It is concise, easy to read, and has a number of features that make it a good choice for game development, such as its support for concurrency and its null safety features. This course will teach you the fundamentals of Kotlin and how to use it to build video games.

See salaries and explore the career path for Game Developer