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RizTech Academy

Java Complete Foundation

The language running most enterprise backends in India. Learn modern Java, not the Java taught in 2010.

Java is still what most large Indian employers run, and knowing it well opens more doors than any other single language on this list.

The problem is that most Java teaching is stuck a decade back — raw loops, no streams, no records, and boilerplate that modern Java no longer needs. You end up writing code that works but marks you as inexperienced.

This course teaches Java as it is written today, while still explaining the older style so you can read legacy code when you meet it.

Who this is for

  • Beginners targeting backend or enterprise roles
  • Students whose college syllabus taught outdated Java
  • Anyone heading towards the Spring Boot course

What you need first

  • A computer with at least 8 GB RAM
  • No prior Java experience required

Tools you will use

Java 21 (LTS)IntelliJ IDEA CommunityMavenJUnit 5

By the end you can

  • Write modern Java using records, streams, var and switch expressions
  • Apply object-oriented design without over-engineering
  • Use collections and the Streams API fluently
  • Handle exceptions deliberately, including checked versus unchecked
  • Write unit tests with JUnit 5
  • Build and manage a project with Maven
Syllabus

8 modules, 38 lessons

Work through these in order. Each lesson is short enough to finish in one sitting and ends with something to build, not a quiz.

  1. 1

    Getting Started

    JDK, IDE, and understanding how Java actually runs.

    1. What Java is and why it is everywhereComing soon
    2. JDK, JRE and JVM explained clearlyComing soon
    3. Installing Java 21 and IntelliJ IDEAComing soon
    4. Your first program, and what public static void main meansComing soon
  2. 2

    Language Basics

    Types, variables and control flow.

    1. Variables, primitives and varComing soon
    2. Strings, text blocks and formattingComing soon
    3. Operators and precedenceComing soon
    4. if, switch expressions and loopsComing soon
    5. Arrays and their limitationsComing soon
  3. 3

    Object-Oriented Java

    The core of Java, taught with real problems rather than Animal and Dog examples.

    1. Classes, objects and constructorsComing soon
    2. Encapsulation and access modifiersComing soon
    3. Inheritance and polymorphismComing soon
    4. Interfaces and default methodsComing soon
    5. Abstract classes: when and when notComing soon
    6. Records: the modern way to hold dataComing soon
    7. Enums and why they beat constantsComing soon
  4. 4

    Collections

    List, Map, Set and choosing correctly between them.

    1. The Collections framework, mapped outComing soon
    2. List and ArrayListComing soon
    3. Map and HashMapComing soon
    4. Set, and removing duplicates properlyComing soon
    5. equals and hashCode: the contract you must not breakComing soon
    6. Choosing the right collectionComing soon
  5. 5

    Streams and Functional Java

    The modern way to transform data, and the biggest gap in most college syllabuses.

    1. Lambdas and functional interfacesComing soon
    2. Streams: map, filter, collectComing soon
    3. Optional, used correctlyComing soon
    4. Grouping and partitioning with CollectorsComing soon
    5. Practice: rewriting loops as streamsComing soon
  6. 6

    Exceptions and Error Handling

    Checked versus unchecked, and how to fail usefully.

    1. Exceptions, try, catch and finallyComing soon
    2. Checked versus unchecked, and the long argument about itComing soon
    3. Writing your own exceptionsComing soon
    4. try-with-resources and closing things properlyComing soon
  7. 7

    Files and I/O

    Reading, writing and working with real data.

    1. Files, Paths and NIOComing soon
    2. Reading and writing text and CSVComing soon
    3. JSON with JacksonComing soon
  8. 8

    Build Tools and Testing

    Maven, JUnit and the professional habits that follow you into a job.

    1. Maven: dependencies, lifecycle and the POMComing soon
    2. Unit testing with JUnit 5Coming soon
    3. Good assertions and test structureComing soon
    4. Structuring a Java projectComing soon
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Learning this with a mentor is faster

Our internship programme is free and fully remote. You get this curriculum, real project work, and code review from working developers.

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