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Kotlin & Java: Learn Kotlin and Java With This Course (Udemy.com)

Kotlin and Java together, learn java programming and kotlin for android development from beginner to advanced level |A-Z

Created by: Oak Academy

Last updated September 2026

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What you will learn

  • Kotlin Programming Language
  • What is Kotlin
  • Kotlin Android Fundamentals
  • Java Development Kit - JDK
  • Android Studio
  • Variables in Android Kotlin
  • Kotlin Data Types
  • Type Conversions in kotlin for android
  • Arrays in The complete Android Kotlin Developer Course
  • Operators in android app development kotlin
  • Control Flow Statements
  • Loops in Android App Development
  • All concepts of Object-Oriented Programming
  • kotlin java
  • Kotlin is popular for both Android developers and Java developers.
  • Whether you want to learn Kotlin in order to build your next Android app, or simply need an introduction to language.
  • Kotlin is a statically-typed, general purpose programming language used to develop for the Java Virtual Machine and Android devices

How it compares

Against the other 28 rated Udemy courses in Kotlin on CourseDuck:

  • Rating4.6 out of 5higher than 78% of them
  • Reviews45#29 of 29 by number of reviews
  • Length40 hourslonger than 92% of them
  • Last updatedSeptember 2026more recently than 89% of them

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Course Description

Hey there,

Welcome to the "Kotlin & Java: Learn Kotlin and Java With This Course" course.

Kotlin is popular for both Android developers and Java developers. Whether you want to learn Kotlin in order to build your next Android app, or simply need an introduction to language, Udemy has a top-rated course to help you achieve your goals.

Kotlin is a very new and up-to-date programming language. Kotlin android is accepted by Google as the official language for Android development. Therefore, it is a language that everyone who wants to be an android developer should know. In this course, we teach Kotlin programming language from beginner to advanced level, considering the importance of Kotlin.

Kotlin is a statically-typed, general purpose programming language used to develop for the Java Virtual Machine and Android devices. Kotlin is an amalgamation of the object-oriented and functional programming paradigms and can also be compiled to JavaScript source code.

OAK Academy’s top-rated Java instructors specialize in a wide array of Java programming practices. Whether you need a basic introduction to Java and website building using Selenium WebDriver, or are continuing your Android app developer education, OAK has you covered.

Learn core Java Programming with this core Java course. This java programming course will take you a more experienced level

This Selenium Java Programming online course is one of the most awesome OAK Academy courses which teach step by step and follow the methodology in introducing concepts and demos ( learn by doing ) to the students so that they can learn with ease Java Projects and learn the core java skills needed to apply for Java developer positions.

If you don't know anything about the Kotlin and Java and you want to improve yourself, this course is for you.

In this course, you will learn;

· What Kotlin is and how it works,

· Programming Fundamentals with Kotlin,

· Android Studio

· Java Development Kit – JDK

· Variables in android kotlin

· Kotlin Data Types

· Arrays in kotlin for android

· Operators in android app development kotlin

· Control Flow Statements

· Loops in android studio kotlin

· Functions

· Kotlin for java developers

· All Concepts of Object-Oriented Programming such as Class, Object, Constructor, Encapsulation, Inheritance etc.

· What Java is and how it works,

· Programming Fundamentals with Java,

· Eclipse

· Java Development Kit - JDK,

· Java Runtime Environment – JRE,

· Java Virtual Machine - JVM

· All Concepts of Object-Oriented Programming

· How To Use ‘Static’ Keyword and ‘Nested and Inner’ Classes

· Super Classes and Sub Classes

· Strings,

· Wrapper Classes,

· Throw and Throws

· Exceptions,

· Swing

· Layouts and Grid Layout

· Enum Types and more

At the end of this course, you will learn the Kotlin and Java programming languages in all details and you will have the necessary programming language knowledge to be a good Kotlin and Java developer.

What is Java?

Java is a programming language and platform initially developed by Sun Microsystems and now owned by Oracle. Java is inspired by C and C++ and uses an object-oriented programming model, which means that concepts or things are represented as “objects” that have data fields and methods. One of the biggest advantages of Java is that it runs on a Java Virtual Machine (JVM), meaning that you can execute Java code on any platform that has a JVM, without re-compilation. This is different from C and C++, which require re-compilation for every hardware platform you execute the code on. Java has many other advantages, including automatic memory management. This eliminates hard-to-understand pointers used in languages like C, which can help Java developers write better code in a shorter period of time.

What does it mean that Java is an object-oriented programming language?

Java is an object-oriented programming (OOP) language, which means concepts or things are represented as “objects” that have data fields and methods. In object-oriented programming, models called “objects” represent either a programming entity or an abstract concept. These objects are created and assembled independently of one another but can work with each other in logical ways. Objects are manifestations of classes and can inherit code allowing for code re-use, which can drastically reduce code duplication if used correctly. Additionally, encapsulation, another core OOP concept, allows you to create code with the implementation hidden. Although, in many cases, writing OOP code in Java (and other OOP languages) can take longer than using a procedural language, the benefits obtained with OOP, namely code reusability, encapsulation of data, and readability of code, often result in code that is easier to maintain in the long run.

What is Java used for?

Java is a very versatile language. Several fields use Java, including Android app development, desktop applications that work on many operating systems, server-side applications, and more. The virtual machine required to run Java programs has been ported to numerous operating systems allowing Java to run on virtually all hardware. According to the TIOBE index, Java has consistently been in the top 3 most-used and popular languages since its initial release in the 1990s. Many developers still consider Java the language of choice in areas such as enterprise and application servers, and even in embedded systems development. Many Fortune 500 companies rely on Java to run their core systems and employers often view Java experience on a résumé as favorable due to its popularity.

What certification is best for Java?

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Instructor Details

Oak Academy

Who is Oak Academy?

Oak Academy is a London-based online technology education company. We publish practical, structured video courses in cybersecurity, IT certification, artificial intelligence, data science, software development, and mobile technologies. More than 470,000+ learners have enrolled in Oak Academy courses on Udemy, leaving over 67,000+ reviews across our catalogue. Our courses are produced in English, Portuguese, and several other languages.

What does Oak Academy teach?

Our catalogue is organized around the skills employers actually hire for:

Cybersecurity and ethical hacking — penetration testing, network and web application security, Nmap, Metasploit, Wireshark, Kali Linux, and hands-on practice environments such as TryHackMe and Hack The Box.

IT certification prep — CompTIA A+, Network+, Security+, and newer tracks including CompTIA DataAI, mapped directly to current exam objectives.

Artificial intelligence and data science — Python, NumPy, Pandas, Matplotlib, machine learning with Scikit-learn, R programming, and end-to-end data projects.

Software and mobile development — Python, Java, JavaScript, Flutter and Dart, Android, iOS, and full-stack web development.

How are Oak Academy courses designed?

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Reviews

4.6

45 ratings on Udemy

Select a bar to show only those reviews.Select the bar again to show every rating.

By pwojtasiak on 9/6/2024

Polish version needed

By Gabriel C on 11/3/2021

didn't let me download java 11. found an alternative to get java 17, hopefully they're the same?

By Şenay Taşkınoğlu on 9/29/2021

The course was great.

By Kübra Yılmaz on 9/29/2021

The course content prepared well.

By Petroff Alexander on 9/29/2021

The course is great and well prepared.

By Sunay YILMAZ on 9/28/2021

Awesome course. Every term explained carefully.

By Cem Güleç on 9/28/2021

Splendid way to start learning Kotlin! Good quality content and narrative.

By Alperen Koylu on 9/27/2021

The course is well explained. The content has been kept up to date.

By Kaan Kırant on 9/27/2021

This course is awsome! The course content is updated and well prepared.

By Emre on 9/23/2021

Best course ever.

Showing all 10 reviews on CourseDuck

Read all 45 reviews on Udemy

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Overall Score : 92 / 100