8.6: Pass by Value vs. Pass by Reference - Processing Tutorial

This concept is very confusing to explain, especially to trainee devs even now being a senior dev for a fairly long time.
Basically, there is no such thing in Java as pass-by-reference. As already pointed out, the primitive explanation is correct. Primitives reside on the stack. A copy of the value is passed to the method param and cannot be changed. 
Objects are stored in the heap. When the object reference is passed to the method param a copy is made on the stack which points to the same location to the original object on the heap. Therefore you can change the attributes of the object but the original version (memory reference) is not actually being changed, if that makes sense. Both references are just pointing to the data (values), its these values that are actually getting passed using pointers.

this is a wrong knowledge !!

aP = new Particle ( x, y ); would be a good addition to this review showing the pass by value nature of Java

Made good points, but next time be prepapred. Making shit up as you go is pure laziness.

Pass by value (using primitives) you make a copy, and that is what gets messed with, without affecting the original.
Pass by ref(using objects) you are messing with the object itself because it isn't being copied.

You could use a copy constructor to make a "clone" of an object and mess with that one while preserving the original.

Best video to clearly differentiate between PbV & PbR. Great work!

Thank you

Thank you so much, bearded Harry Potter 😃❤

Your a great teacher ever. Thank you so much for your efforts. 🏆🏆🏆🏆🏆

This is indeed one of the most clear and helpful tutorials that explain the difference between pass by value and pass by reference. Well done!

Finally, understood the difference between passing by value and passing by reference. Great content.

Oh my god. you explain so well

thank you so freaking much

I feel like understanding value and reference types are fundamental to a programmer's understanding of async and multithreaded code. I find that programmers are often told not to use pass by reference without being explained it's to safely avoid bad habits in the future when passing by reference could lead to race conditions and non-threadsafe code.

This is The Professor!

Don't listen to this guy

Heyy youuuu i just wanna thanks to you 🥺 my Mind is going to brust bcz of this concept but not after this video🌻

Thank you 3 years and you did not fix it yet. You are making it frustrating to people who want to learn more.! Such a thoughtful person.

Thank you so much

omg!! amazing it was..

Can't seem to find anywhere what "change()" does.. Can someone help?

His smiling nature is enough to understand things

Pass by value is so annoying! Pass by reference is so much more intuitive

This video should be updated.

Can we use &p instead of ap?

Thank you nong!!

int x=10;
int y;
y=x;
print x;
----------------
x=10
pass by ref.

ty <3

Hallo is There a site were i van download these sketches?

aP will point to P and not to underlying value so far i know

This guy looks like the professor from Money Heist

WTF why did everyone knew java as both pass by reference and pass by value earlier and later in life realized that its always pass by value !! :D

Can someone help me with thus please


A method that takes an array of double. Return whether or not every element in the array appears in ascending order, begining with the SECOND element AND if the first element is equal to the sum of all elements beginning with the second element. You must use 1 loop at the most for this and recall the difficulty of checking equality with doubles that may contain math error.

you look like you planning to rob a bank. bank of spain, perhaps? kiddin, thank u for this

If he bit changed, He will look like Professor from Money Heist

there's no pointers concept in java?

You are an amazing teacher!

Lol make sense... after watching it again ... after 1 year

Worst explanation ever

This is a tricky concept when you are learning programming languages like c ,etc,3 pages of gibberish text from the book solve ,hope you tube was there back in the 90's learning programming could be fun...thanks master!!!!

Thank you

Thank you

When I play around with this concept it doesn't seem to apply to String or BigInteger...could someone explain why?

Fantastic explanation, thank you!

aP → uP 😎👍

say what?

This video has been very usefull for me thanks u man !