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Hi, I'm John! I'm a Lead Java Software Engineer and I've been in the programming industry for more than a decade. I love sharing what I've learned over the years in a way that's understandable for all levels of Java learners.

Learn or improve your Java by watching it being coded live!

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programming tutorial

coding tutorial

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Featured video

Generics In Java - Full Simple Tutorial

Coding with John

1,201,349 views

3 years ago

Coding with John

Generics In Java - Full Simple Tutorial

Generics In Java - Full Simple Tutorial

1,201,349 views

3 years ago

Coding with John

Multithreading in Java Explained in 10 Minutes

Multithreading in Java Explained in 10 Minutes

1,012,163 views

3 years ago

Coding with John

Learn Java in One Video - 15-minute Crash Course

Learn Java in One Video - 15-minute Crash Course

815,704 views

3 years ago

Coding with John

Lambda Expressions in Java - Full Simple Tutorial

Lambda Expressions in Java - Full Simple Tutorial

804,983 views

3 years ago

Coding with John

Java Unit Testing with JUnit - Tutorial - How to Create And Use Unit Tests

Java Unit Testing with JUnit - Tutorial - How to Create And Use Unit Tests

734,783 views

3 years ago

Coding with John

Map and HashMap in Java - Full Tutorial

Map and HashMap in Java - Full Tutorial

636,880 views

3 years ago

Coding with John

Java Strings are Immutable - Here's What That Actually Means

Java Strings are Immutable - Here's What That Actually Means

630,585 views

3 years ago

Coding with John

LinkedList vs ArrayList in Java Tutorial - Which Should You Use?

LinkedList vs ArrayList in Java Tutorial - Which Should You Use?

625,445 views

3 years ago

Coding with John

Array vs. ArrayList in Java Tutorial - What's The Difference?

Array vs. ArrayList in Java Tutorial - What's The Difference?

586,404 views

3 years ago

Coding with John

Abstract Classes and Methods in Java Explained in 7 Minutes

Abstract Classes and Methods in Java Explained in 7 Minutes

584,257 views

3 years ago

Coding with John

Java File Input/Output - It's Way Easier Than You Think

Java File Input/Output - It's Way Easier Than You Think

520,839 views

3 years ago

Coding with John

Exception Handling in Java Tutorial

Exception Handling in Java Tutorial

448,416 views

4 years ago

Coding with John

JVM, JRE, and JDK - Fully Explained in 5 Minutes

JVM, JRE, and JDK - Fully Explained in 5 Minutes

19,816 views

3 weeks ago

Coding with John

New Java Version 22 - The 3 Best New Features You'll ACTUALLY Use

New Java Version 22 - The 3 Best New Features You'll ACTUALLY Use

126,638 views

9 months ago

Coding with John

Java is "Strongly Typed"? - Here's What That ACTUALLY Means

Java is "Strongly Typed"? - Here's What That ACTUALLY Means

70,541 views

1 year ago

Coding with John

Java's Garbage Collection Explained - How It Saves your Lazy Programmer Butt

Java's Garbage Collection Explained - How It Saves your Lazy Programmer Butt

93,222 views

1 year ago

Coding with John

Static vs Non-Static Variables and Methods In Java - Full Simple Tutorial

Static vs Non-Static Variables and Methods In Java - Full Simple Tutorial

228,265 views

1 year ago

Coding with John

How I Memorized ALL IntelliJ Shortcuts Effortlessly

How I Memorized ALL IntelliJ Shortcuts Effortlessly

55,594 views

1 year ago

Coding with John

Java's Hello World Is About To Change Forever

Java's Hello World Is About To Change Forever

196,494 views

1 year ago

Coding with John

Selection Sort Tutorial in Java: The Snail's Guide to Sorting

Selection Sort Tutorial in Java: The Snail's Guide to Sorting

65,731 views

1 year ago

Coding with John

Vectors in Java: The 1 Situation You Might Want To Use Them

Vectors in Java: The 1 Situation You Might Want To Use Them

89,600 views

1 year ago

Coding with John

Binary Search in Java - Full Simple Coding Tutorial

Binary Search in Java - Full Simple Coding Tutorial

136,509 views

2 years ago

Coding with John

Set and HashSet in Java - Full Tutorial

Set and HashSet in Java - Full Tutorial

249,670 views

2 years ago

Coding with John

Why Are All The Best Java YouTubers Bald? - John Answers Your Comments

Why Are All The Best Java YouTubers Bald? - John Answers Your Comments

19,852 views

2 years ago

Coding with John Tutorials

Coding with John

Java is "Strongly Typed"? - Here's What That ACTUALLY Means

Java is "Strongly Typed"? - Here's What That ACTUALLY Means

70,541 views

1 year ago

Coding with John

Java's Garbage Collection Explained - How It Saves your Lazy Programmer Butt

Java's Garbage Collection Explained - How It Saves your Lazy Programmer Butt

93,222 views

1 year ago

Coding with John

Static vs Non-Static Variables and Methods In Java - Full Simple Tutorial

Static vs Non-Static Variables and Methods In Java - Full Simple Tutorial

228,265 views

1 year ago

Coding with John

How I Memorized ALL IntelliJ Shortcuts Effortlessly

How I Memorized ALL IntelliJ Shortcuts Effortlessly

55,594 views

1 year ago

Coding with John

Java's Hello World Is About To Change Forever

Java's Hello World Is About To Change Forever

196,494 views

1 year ago

Coding with John

Selection Sort Tutorial in Java: The Snail's Guide to Sorting

Selection Sort Tutorial in Java: The Snail's Guide to Sorting

65,731 views

1 year ago

Coding with John

Vectors in Java: The 1 Situation You Might Want To Use Them

Vectors in Java: The 1 Situation You Might Want To Use Them

89,600 views

1 year ago

Coding with John

Binary Search in Java - Full Simple Coding Tutorial

Binary Search in Java - Full Simple Coding Tutorial

136,509 views

2 years ago

Coding with John

Java's Creators Rejected Multiple Inheritance - Here's Why

Java's Creators Rejected Multiple Inheritance - Here's Why

71,887 views

2 years ago

Coding with John

LeetCode Exercise in Java Tutorial - Two Sum FAST Solution

LeetCode Exercise in Java Tutorial - Two Sum FAST Solution

204,690 views

2 years ago

Coding with John

Java Custom Exceptions Tutorial - It's Way Easier Than You Think

Java Custom Exceptions Tutorial - It's Way Easier Than You Think

176,534 views

2 years ago

Coding with John

Optionals In Java - Simple Tutorial

Optionals In Java - Simple Tutorial

230,425 views

2 years ago