Java — Zero to Hero

4h 4m total

A complete, hands-on Java journey from your first JDK install to shipping an idiomatic, tested, concurrent command-line application. Built on Java 25 (LTS), it mixes prose, runnable code, MCQ checks, output-prediction drills, ordering and matching activities, an embedded JShell sandbox, environment checklists, and mentor-chat prompts so every skill is rehearsed in the format that fits it best.

Java CoreProgramming FundamentalsCareer SWE Foundations

Includes:

Cheat sheet
Progress tracking
Audio narration
Mentor context

Outline

Enroll to unlock

1.
Getting Set Up: JDK, JShell, and Your First Program
28 min3 lessons
1. Locked — enroll to unlock. Install the JDK and verify it works8 min
2. Locked — enroll to unlock. JShell and your first program10 min
3. Locked — enroll to unlock. Editors and build tools10 min
2.
Syntax, Variables, and Core Types
32 min3 lessons
1. Locked — enroll to unlock. Variables, primitives, and references10 min
2. Locked — enroll to unlock. Strings and text12 min
3. Locked — enroll to unlock. Operators, autoboxing, and conversions10 min
3.
Control Flow: Branches, Loops, and Switch
26 min3 lessons
1. Locked — enroll to unlock. if/else and loops8 min
2. Locked — enroll to unlock. switch, the modern way8 min
3. Locked — enroll to unlock. Pattern matching & iteration10 min
4.
Methods, Overloading, and Lambdas
30 min3 lessons
1. Locked — enroll to unlock. Defining methods, overloading, varargs10 min
2. Locked — enroll to unlock. Parameter passing and scope10 min
3. Locked — enroll to unlock. Lambdas, functional interfaces, method references10 min
5.
Collections, Generics, and Streams
24 min3 lessons
1. Locked — enroll to unlock. List, Set, Map, and generics8 min
2. Locked — enroll to unlock. Generics deeper and Optional8 min
3. Locked — enroll to unlock. Streams8 min
6.
Classes, Interfaces, Records, and Enums
24 min3 lessons
1. Locked — enroll to unlock. Classes, encapsulation, inheritance8 min
2. Locked — enroll to unlock. Interfaces, records, enums, sealed8 min
3. Locked — enroll to unlock. equals, hashCode, and modeling in practice8 min
7.
Files, I/O, Exceptions, and Logging
30 min3 lessons
1. Locked — enroll to unlock. Exceptions12 min
2. Locked — enroll to unlock. try-with-resources & files (NIO.2)10 min
3. Locked — enroll to unlock. Logging8 min
8.
Testing, JavaDoc, and Build/Quality Tools
22 min3 lessons
1. Locked — enroll to unlock. JUnit 5 basics8 min
2. Locked — enroll to unlock. Parameterized tests and JavaDoc6 min
3. Locked — enroll to unlock. Build and quality tools8 min
9.
Standard Library, Concurrency, and a Real Capstone
28 min3 lessons
1. Locked — enroll to unlock. Standard library tour10 min
2. Locked — enroll to unlock. Concurrency and virtual threads8 min
3. Locked — enroll to unlock. Capstone: concurrent URL health-checker CLI10 min

Includes:

Cheat sheet
Progress tracking
Audio narration
Mentor context

Outline

Enroll to unlock

1.
Getting Set Up: JDK, JShell, and Your First Program
28 min3 lessons
1. Locked — enroll to unlock. Install the JDK and verify it works8 min
2. Locked — enroll to unlock. JShell and your first program10 min
3. Locked — enroll to unlock. Editors and build tools10 min
2.
Syntax, Variables, and Core Types
32 min3 lessons
1. Locked — enroll to unlock. Variables, primitives, and references10 min
2. Locked — enroll to unlock. Strings and text12 min
3. Locked — enroll to unlock. Operators, autoboxing, and conversions10 min
3.
Control Flow: Branches, Loops, and Switch
26 min3 lessons
1. Locked — enroll to unlock. if/else and loops8 min
2. Locked — enroll to unlock. switch, the modern way8 min
3. Locked — enroll to unlock. Pattern matching & iteration10 min
4.
Methods, Overloading, and Lambdas
30 min3 lessons
1. Locked — enroll to unlock. Defining methods, overloading, varargs10 min
2. Locked — enroll to unlock. Parameter passing and scope10 min
3. Locked — enroll to unlock. Lambdas, functional interfaces, method references10 min
5.
Collections, Generics, and Streams
24 min3 lessons
1. Locked — enroll to unlock. List, Set, Map, and generics8 min
2. Locked — enroll to unlock. Generics deeper and Optional8 min
3. Locked — enroll to unlock. Streams8 min
6.
Classes, Interfaces, Records, and Enums
24 min3 lessons
1. Locked — enroll to unlock. Classes, encapsulation, inheritance8 min
2. Locked — enroll to unlock. Interfaces, records, enums, sealed8 min
3. Locked — enroll to unlock. equals, hashCode, and modeling in practice8 min
7.
Files, I/O, Exceptions, and Logging
30 min3 lessons
1. Locked — enroll to unlock. Exceptions12 min
2. Locked — enroll to unlock. try-with-resources & files (NIO.2)10 min
3. Locked — enroll to unlock. Logging8 min
8.
Testing, JavaDoc, and Build/Quality Tools
22 min3 lessons
1. Locked — enroll to unlock. JUnit 5 basics8 min
2. Locked — enroll to unlock. Parameterized tests and JavaDoc6 min
3. Locked — enroll to unlock. Build and quality tools8 min
9.
Standard Library, Concurrency, and a Real Capstone
28 min3 lessons
1. Locked — enroll to unlock. Standard library tour10 min
2. Locked — enroll to unlock. Concurrency and virtual threads8 min
3. Locked — enroll to unlock. Capstone: concurrent URL health-checker CLI10 min

Outline

Getting Set Up: JDK, JShell, and Your First Program

Syntax, Variables, and Core Types

Control Flow: Branches, Loops, and Switch

Methods, Overloading, and Lambdas

Collections, Generics, and Streams

Classes, Interfaces, Records, and Enums

Files, I/O, Exceptions, and Logging

Testing, JavaDoc, and Build/Quality Tools

Standard Library, Concurrency, and a Real Capstone

Outline

Getting Set Up: JDK, JShell, and Your First Program

Syntax, Variables, and Core Types

Control Flow: Branches, Loops, and Switch

Methods, Overloading, and Lambdas

Collections, Generics, and Streams

Classes, Interfaces, Records, and Enums

Files, I/O, Exceptions, and Logging

Testing, JavaDoc, and Build/Quality Tools

Standard Library, Concurrency, and a Real Capstone