Best 5 Apps to learn Java Programming for free on Android. Today, we’re focusing on Java, one of the most popular programming languages in use today. Many people worldwide are eager to learn Java, whether for free or through paid resources.
If you’re one of those individuals, this article is here to guide you in understanding Java at no cost. We’ve compiled a list of the best apps for learning Java on Android devices, and all of these apps are completely free. Let’s dive into our list:
1. Learn Java: Programiz
Learn Java by Programiz is an excellent app for beginners looking to start their journey with Java. Available for both Android and iOS, this app features a wide range of chapters designed to teach Java from the ground up.
The app includes numerous examples and challenges to help you practice Java programming effectively. You can also add your favorite lessons to a personal list and share content with friends.
You can navigate through chapters and choose to skip or revisit any section. For instance, in Chapter 4, you’ll find lessons on:
- Java Methods
- Method Parameters and Return Types
- Variable Scope
- Standard Library Methods
- Method Examples
- Chapter 6 covers:
- Classes and Objects
- Constructors
- Public and Private Modifiers
- Getters and Setters
- Java Static Keyword
- OOP Basics Examples
After completing a chapter, you can test your knowledge with a quiz.
2. CodeGym: Learn Java
CodeGym is tailored for individuals aspiring to become Java developers, Android developers, or QA/Test Automation Experts. The app offers various learning methods, including preparing for the AP Java exam, reading, or engaging in interactive exercises.
You can start learning Java from scratch or assess your existing programming knowledge. You will find the lessons in this app like:
- Java for Beginners
- How to use CodeGym
- The virtual machine and the first command
- Ready for the first program
- Ellie, variables, and data types
- What are compilers?
- What they don’t teach you in school
- Summary of level
- The future is already here
- CodeGym’s Java course
- CodeGym subscriptions
- Memory addressing and variables
- Introducing ints and Strings
- Pratice from Diego
- Concluding a contract
- Keyboard input
- Enter a number
- Professor Noodles to the rescue
- Nerd break
- How can i realize my potential?
- Tasks on CodeGym
- Help section
- Visibilty of variables
- More about variable scope
- Pratice with variable visibilty
- Commands and code blocks
- Conditional operators
- Comparing and setting conditions
- Operations on int variables
- Boolean type
- Logical operators
- Additional lessons for level
- How a CPU works in 100 seconds // Apple Silicon M1 vs Intel i9
- Loops
- Tasks about loops
- For Loop
- For loop in pratice
- Interrupting a loop
- How do hard drives work?
- Tasks with and without asterisks
- How long can a software developer’s career last?
- Support on CodeGym
- Installing the IDK
- Installing Intellij IDEA
- Installing the CodeGym plugin
- IDEA life hacks
- Debugging in IDEA
- Debugging in IDEA: variables
- Additional lessons for level
- Nerd break
- I’m the best
- Arrays
- Arrays in memory
- Basic actions with arrays
- Pratice creating and using arrays
- Tw0-dimensional arrays
- Jagged arrays in Java
- Arrays – a helper class
- Arrays class, part 2
- Nerd break: musical interlude
- The path of the programmer
- Creating your own methods and passing arguments
- Method parameters in Java
- Result of a method
- Pratice calling methods
- Method modifiers
- Variable visibilty
- Nuances of working with variables
- The Breakout story
- Informational technology
- Object interaction
- Primitive data types
- Creating objects
- Different ways to create variavles
- Reference variables
- Full class name
- Real types
- Introducing the Data type
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The app supports multiple languages, including:
- English
- French
- Hindi
- Indonesian
- Chinese
- Dutch
- German
- Korean
- Portuguese
- Japanese
Note: you must complete lessons in order, as skipping is not permitted!
3. Easy Coder: Learn Java
Easy Coder allows you to select your level—beginner, intermediate, or advanced—and start learning Java based on your preferred method. Choices include Hands-On Exercises, Video Tutorials, Theory First, or No Strong Preference.
You can also set your main goal from options such as:
- Building a Specific Project
- Starting a Career in Programming
- Sharpening Your Mind
- Exploring Without a Specific Goal
The app covers a range of topics, including:
- Variables
- Inputs
- Comparisons
- Conditions
- Loops
- Arrays
- Methods
- Strings
- Classes
- Inheritance
- Errors
- Files
- Internet
- Data Structures
- Advanced OOP
4. Learn Java Programming
This app features two primary sections. The first section, lessons, provides comprehensive explanations of the Java programming language, covering:
- Introduction to Java
- Data Types & Operators
- Control Statements & Loops
- Arrays & Wrapper Classes
- Basics of Object-Oriented Programming (OOP)
- Features of OOP
- OOP Keywords & Methods
- Advanced OOP Concepts
- Exception Handling
- Multithreading
- Collections Framework
- File Handling
- Applets
- Abstract Window Toolkit (AWT)
- Swing
- Networking
The second section, programs, guides you through writing Java code with various commands. It also includes a Compiler section for practicing code execution, featuring a list of Java explanations in video format (note: a video player on your device is required). Additionally, there is a quiz section that lets you test your knowledge based on the app’s lessons.
Examples of code you can learn to write in the programs section include:
- Finding the Largest and Smallest Number in an Array
- Calculating Factorial Using Recursion
- Reversing a Number
- Swapping Numbers
- Infinite For Loop
- Public Access Modifier
- Simple Java Calendar
- Java Data Examples
- Sorting a String Array
- Converting Binary to Decimal
- Constructor Class
- Super Keyword
- Interface
- Merge Sort
- Heap Sort
- Floyd’s Cycle Algorithm
- Synchronization
- Hashtable (Legacy Class)
5. Java Tutorial – Simplified
This app offers a series of lessons that break down the Java language into manageable units, each serving as a course for learning Java on Android. Topics covered include:
- Basic Java Concepts
- Data Types
- Selection Statements
- Iteration
- Functions
- Mathematics
- Abstraction
- Encapsulation
- Errors
- Exception Handling
- Abstract Window Toolkit (AWT)
- Swing
- Date and Time
- Applets
Additionally, the app includes a set of interview questions to help you prepare for job interviews, such as:
- Why is multiple inheritance not supported in Java?
- Can static methods be overridden?
- What is a marker interface?
- What is the JIT compiler?
- Why are pointers not used in Java?
- What is an abstract class?
- What is the difference between HashMap and Hashtable?
- Explain exception propagation.
- What is a singleton class?
- Is it possible to instantiate abstract classes?
- How can you create a read-only class in Java?
- What is a Map in Java?
Java Tutorial covers over 200 topics, more than 180 programs, over 100 Java syntax rules, and over 40 interview questions, in addition to more than 70 questions to test yourself.
In conclusion, we have provided an overview of the best apps for beginners to learn Java programming. I hope you find this information helpful! If you have any further questions or need additional recommendations, feel free to ask in the comments section below.
