Learn Java in One Video - 15-minute Crash Course

Learn all the essential basics of Java in one video in just 15 minutes. No programming experience required.

Variables, loops, methods, classes, objects, and more!

This is a Java beginner's lesson for the ultimate Java beginner, or just someone curious to know the basics of how a Java program can be created and run. In just a few minutes you'll know everything you need to know about Java to start making some awesome programs.

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

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.

Let me know what else you'd like to see!

Links to any stuff in this description are affiliate links, so if you buy a product through those links I may earn a small commission.

📕 THE best book to learn Java, Effective Java by Joshua Bloch

📕 One of my favorite programming books, Clean Code by Robert Martin

🎧 Or get the audio version of Clean Code for FREE here with an Audible free trial

🖥️Standing desk brand I use for recording (get a code for $30 off through this link!)

📹Phone I use for recording:

🎙️Microphone I use (classy, I know):

Donate with PayPal (Thank you so much!)

☕Complete Java course:

[ar_prichan]

You summarized a whole one semester in just 15 minutes and I understand everything than my lecturer did. Awesome!

[ifetayoali]

I’ve been in class for like a month and somehow you have explained everything far better than the lectures. This is the first time I’ve understood Java

[LisaCoppola]

I cannot believe how nicely you simplified three weeks of confusion for me. Thank you so much!

[tonyg]

You've explained static / not static in the most clear concise way where it finally clicked for me. This whole entire video was well said. I had low expectations when I saw 15 minutes but you really did an extremely good job.

[shynoobi]

I think this is one of the best crash course that I've watched! I have been binge watching Java videos for beginners and yours had cleared questions that I have. Thank you!

[MarkWesley]

13:19
Your explanation of 'static' is most excellent. Thank you!
Edit: I bounce back and forth between your videos and my college book by Walter Savitch. Please keep posting these great videos.

[janjanbinks]

I have a Java test this Monday and yesterday I broke down and cried myself to sleep because I was so frustrated and confused with my lectures, now things seem way, way simpler for me. I understood in 15 minutes what I have tried to understand a whole semester. Thank you thank you thank you!

[AdrianTregoning]

This is absolute gold. I'm doing two online courses and they haven't explained this as well. Thank you John!

[elrymoe]

Found so many videos that talk and never explain, your video is so refreshing

[valentin-slnr]

I rarely write any comments but this was really really useful. No any unnecessary information, not too prolonged with too many details that are unneeded. Just the basic things we're looking for. Huge thanks!!

[imma]

I'm a beginner programmer and I've been learning python actually for about 3 weeks now, but I am interested in learning about Java too. Gotta say compared to a simple
print("Hello World") in python, the way to print hello world in java seemed way more complicated. this video helped me to have a better understanding of how python scripts work.

[jessicar]

Subscribed.
Bro explaining it to us like we’re 5. Literally what I needed, thank you John!!

[Kira-tzbs]

This is one of the best crash course video I've ever seen in YouTube. Keep up the good work, John!

[cmenorp]

I have just started a Masters in this and have never done it before!
This helped a lot, thanks John.

[johndrowned]

To be honest, in my 3 years of experience, I hadn't come across a very straightforward and understandable explanation of Static vs Non-Static. Whenever people try to explain it, they tend to prioritize either time or quality, sacrificing one over the other. But in this case, you managed to provide a nice explanation without compromising on either time or quality. Great job! ( I was really struggling to explain this to a friend)

[Amtube-op]

Give this man a medal👏 —thank you! I can’t tell you, you just troubleshooted my brain and made all the Java I reviewed for the last 4 months make sense in 10 mins. Bless you, child.

[banulalakwindu]

Love this... Now I remember all forgot things about Java. Thank you.

[jaybonn]

Thank you for FINALLY explaining public static void. The response i always got was oh you dont need to worry about that, its just a name.

Yet the entire code fails if you dont copy it exactly...

[adxxsh]

Oh God! I've watched the whole video and understood every single thing he explained for 15 mins straight. You did a wonderful work. Thank you sir!!

[yunheecho]

5 years ago, when I first studied Java, I had no clue and gave up after a few try. Now I find your videos, I now realise it is a quite intuitive language!! I find your examples so entertaining as well :D Thank you so much for putting so much of your effort and time in these videos <3 I wanna check out more of your beginners videos!!