Reversing the Values in an Array (Java Tutorial)

This Java tutorial for beginners will explain and demonstrate an algorithm for reversing the values in an array.
Aligned to AP Computer Science A.
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#Java #JavaTutorial #JavaTutorials

[@BillBarnum]

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[@MitchieWee]

As someone who learns by visualising I really appreciate this video. Help me not just understanding what i need to to but also WHAT i am doing. Thanks!

[@f3rdi881]

Without the visuals this would have been impossible to comprehend.

[@user-lj7yy7gx3w]

Great video , in terms of explanatory power , you actually shed light into how the code works step by step. Not so many youtubers delve into the details of the code . ( commenting as a begginer)

[@BillBarnum]

Thanks for the comment, Δημητρης. I'm glad you found the video useful!

[@Gamuss12345]

So far the best tutorial I've ever seen! Love this concept or explanation + visualisation! Thank you, Bill!

[@dmitrykoveshnikov]

Great video. THANK YOU

[@JULIEDELARO]

Oooh I love this. I'm at the start of my software engineering degree program online. The instruction is basically read the book, now code. I don't learn that way. This helped. Subscribed.

[@BillBarnum]

I'm glad you found it helpful!

[@kingjulian1046]

Great explanation and visuals really made a complex idea easy to understand top stuff.

[@mardavboy]

I am learning rn Arrays and this topic really hard on me but found your video and it helped me understand the logic behind the reverse exercise I had to make. thanks!

[@BillBarnum]

Thanks for the feedback, Mark! I'm glad you liked the video.

[@Sami67995]

step by step explanation and thanks for sharing

[@NicolasEZapata]

So clear I knew what to do by the middle of the video. Good Stuff Sir!

[@sudelicious.4045]

keep doing the visual, it helps me to learn this very clearly. thanks a lot!

[@BillBarnum]

Thanks for the feeback. I'm glad you found the video useful!

[@gabrielmiyamoto3917]

Life Saver! clear explanation Thank you!

[@BillBarnum]

Thanks for the feedback! I'm glad you found it useful.

[@chrisbaisley5571]

Very helpful, thank you!

[@BillBarnum]

Thanks, Chris.

[@PatrycjaMarkiewicz]

Great algorithm :)

[@birkhansonkan4236]

visual explanaition is a great way of teaching, thanks

[@bextrekks8354]

visual helped a lot - thanks!!

[@BillBarnum]

Thanks for the comment, Bex! I'm glad that you liked the video.

[@syedghouseullah]

Thankyou sir 🙏

[@yasinfahmy]

perfect, thanks!!!

[@BillBarnum]

Glad it helped!

[@luxfortis4377]

thanks

[@Aryaveer_jadli]

Thank you sensei. I love u for this💋

[@harshadaborade5712]

Great🙏

[@BillBarnum]

Thanks for the feedback!

[@kashvibhatia9910]

Thank you so much

[@BillBarnum]

I'm glad you liked the video, Kashvi!

[@RandomNoob1124]

This visual is the best part🔥🔥🔥

[@BillBarnum]

Thanks for the feedback!

[@madchallenges847]

how to print at the end?

[@BillBarnum]

Before you declare the class: import java.util.Arrays; When you are ready to print it: System.out.println(Arrays.toString(x)); //assuming the array is named x

[@nadunrathnayaka160]

why we divide length by 2

[@BillBarnum]

We only go through the first half of the array. As we are going through the first half, we swap values with the corresponding index in the second half.

[@nadunrathnayaka160]

@@BillBarnum thank you sir

[@why1t]

If we aren't supposed to use this method on the AP exam, what method do we use then?

[@BillBarnum]

The algorithm I demonstrated would be fine. I mentioned another algorithm to reverse values using a temp array. However, I did not demonstrate that method.

[@why1t]

@@BillBarnum ah, ok. Thanks! :)

[@arhzzzmusic556]

What do i type to write the array out Out.print what???

[@BillBarnum]

I don't quite understand your question.

[@arhzzzmusic556]

@@BillBarnum Dont worry I've figured it out.

[@BillBarnum]

@@arhzzzmusic556 Great!

[@Aryaveer_jadli]

@@arhzzzmusic556 how did u do that bro?

[@nickhlope1717]

How did you print out the array elements to display

[@nickhlope1717]

Great video. Just wanna ask why we had to say x.length - i - 1....what exactly does that mean

[@BillBarnum]

We want to swap each index with its corresponding value on the other end of the array. If i is 0, then x.length - i -1 will be the last index. If i is 1, then x.length - i - 1 will be the second to last index.

[@brankoblesicjr.5792]