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Module 01 - Java OOP Foundation

What This Module Builds

This module creates the first compileable Java/Maven project and introduces the Java concepts needed before Selenium appears.

The code is intentionally small. It models automation ideas without using Selenium yet:

  • _01_BrowserSession represents a future browser session.
  • _02_LoginAttempt represents user input for a login form.
  • _03_TestCaseSummary represents a simple test case and its steps.
  • _04_Module01Demo runs the examples and shows collections, loops, objects, and method calls.

Why We Start Here

Selenium frameworks are Java projects first. If classes, objects, constructors, access modifiers, methods, and collections are unclear, later framework code such as BaseTest, LoginPage, and DriverFactory will feel like magic.

This module makes those ideas visible before Selenium is introduced.

Learning Flow

flowchart TD
    A["Java project structure"] --> B["Classes and objects"]
    B --> C["Fields and methods"]
    C --> D["Constructors"]
    D --> E["Access modifiers"]
    E --> F["Static vs instance members"]
    F --> G["Lists, maps, loops"]
    G --> H["Automation-style examples"]
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Concepts Covered

Concept Where to Study
Maven project structure pom.xml
Class and object _01_BrowserSession, _02_LoginAttempt
Fields and methods all Module 01 classes
Constructor _01_BrowserSession, _02_LoginAttempt, _03_TestCaseSummary
Access modifiers private fields and public methods
static _01_BrowserSession.DEFAULT_BROWSER, createdSessionCount
Lists _03_TestCaseSummary, _04_Module01Demo
Maps _04_Module01Demo
Loops _04_Module01Demo

Files Added Or Changed

File Status Purpose
pom.xml added Java 21 Maven project setup and exec:java entrypoint
README.md added Project entrypoint and current module commands
src/main/java/com/learning/examples/module01/_01_BrowserSession.java added class, fields, constructors, static members
src/main/java/com/learning/examples/module01/_02_LoginAttempt.java added form-style object with simple validation methods
src/main/java/com/learning/examples/module01/_03_TestCaseSummary.java added list usage and defensive copy
src/main/java/com/learning/examples/module01/_04_Module01Demo.java added runnable demo for objects, collections, and loops
docs/module-01-java-oops-foundation/99-interview-review.md added interview-ready Java/OOP revision notes for this module

Module Source Links

Use these links as the source-reading checklist for this checkpoint. They point only to files that exist at Module 01.

File Status Why It Matters
AGENTS.md Changed Module session metadata
CLAUDE.md Changed Module session metadata
plan.md Changed Curriculum blueprint
pom.xml Changed Maven build and dependency configuration
src/main/java/com/learning/examples/module01/_01_BrowserSession.java Renamed Learning Java example source
src/main/java/com/learning/examples/module01/_02_LoginAttempt.java Renamed Learning Java example source
src/main/java/com/learning/examples/module01/_03_TestCaseSummary.java Renamed Learning Java example source
src/main/java/com/learning/examples/module01/_04_Module01Demo.java Renamed Learning Java example source

Source Organization Note

Module 01 code lives under com.learning.examples.module01 because these classes are teaching examples, not reusable Selenium framework classes.

The package com.learning.framework is reserved for real framework code that appears later, such as page objects, driver management, config readers, wrappers, waits, screenshots, and reporting services.

What Is Intentionally Deferred

  • No Selenium dependency yet.
  • No TestNG dependency yet.
  • No BaseTest.
  • No Page Object Model.
  • No browser launch.

Those concepts come later after the Java foundations are clear.

Quality Gate

Run:

mvn compile
mvn exec:java

Both commands should complete successfully.

Readiness Standard

Before moving beyond this module, a learner should be able to explain these ideas without memorizing code:

  • why Java code is organized into classes and packages.
  • how an object differs from a class.
  • why fields are usually private and methods are public.
  • what a constructor does before an object can be used.
  • how this, static, final, List, Map, and loops appear in real test automation code.
  • why these simple examples prepare for WebDriver, page objects, config readers, and test data classes later.

Use 99-interview-review.md as the final revision pass for this module.