10.3 Java Helsinki Uni MOOC programming 1 part 2! Methods Part 3 of 3

This is part 3 of the Methods section and in this tutorial, we work the next few challenges, including Smallest, Greatest, Averaging, Star sign and Advanced astrology.

0:00 Intro
0:53 Smallest challenge
02:40 Greatest challenge
05:50 Averaging challenge
09:27 Execution of Method Calls and the Call Stack
12:33 Call Stack and Method Parameters
17:15 Method Calling Another Method
19:46 Star sign challenge (Part 1 of 4 - Printing stars)
22:15 Star sign challenge (Part 2 of 4 - Printing a square)
24:22 Star sign challenge (Part 3 of 4 - Printing a rectangle)
26:05 Star sign challenge (Part 4 of 4 - Printing a triangle)
28:26 Advanced astrology challenge (Part 1 of 3 - Printing stars and spaces)
31:46 Advanced astrology challenge (Part 2 of 3 - Printing stars and spaces)
33:25 Advanced astrology challenge (Part 3 of 3 - Printing stars and spaces)
37:00 Outro

Remember to keep practising and trying new things and happy coding! If you like the video, please give it a thumbs up and subscribe.

[usoppgostoso]

If there's anyone out there strugling with the printTriangle method, it's actually like so:
public static void printTriangle(int size) {
for (int i = 1; i <= size; i++) {
printSpaces(size - i);
printStars(i);
}
}
It's size - i, not minus 1.

[MrKamakazi]

Oh wow that Xmas tree was a doozy 🤯. You breezed through that with no problems 😅. Thank you

[itzeshaan]

Thanks so much! Please keep uploading. These videos help a lot

[rensspiljard]

Thank you so much I was struggeling with the christmastree

[lucasotaku]

I managed to finish and pass the last exercise using 'while' loop.
But man, I'm looking at your solution with 'for' loop now and it looks so much more simple and efficient than mine haha
And thank your for this videos, they're helping a lot

" public static void christmasTree(int height) {
int count = 0;
int test = 1;
while (count < height) {
printSpaces((height - 1) - count);
count++;
printStars (test);
test = test + 2;
}
printSpaces((test-4)/2);
printStars(3);
printSpaces((test-4)/2);
printStars(3);
}"

[lucrisia_molyneux]

Thanks a lot! Please continue uploading until part 14.

[wholesomeSloth]

The freaking tree man, If you knew the dumb apporaches I tried before actually realizing that I can substract 1 to multiples of two hahahaha

[spyox]

Thanks for your video but how did you know that it was height-2 for the Christmas tree at the end of the video?

[phillipewolff]

what was your train of thought to do "printStars (2 * i - 1) ??
when I was doing I understand that I would have to use printSpace(height - i) again, but I couldn't reach the same line of thinking of you to end de exercise.

[dblacwell]

I see what you did but I dont understand it. Im not sure if this career is for me.

[RAJUBHAI-wwem]

Hey duncan i got a doubt, regarding star sign one the thing is i used while loop

So the code is

public static void printStars(int number){
int i = 0 ;
while ( i<number ){
sout(" * ");
i++;
}

So the output is vertical

*
*
*

But i need horizontal ***

So how to achieve this by using while loop

[turki-glbt]

man in this part ive been really struggling without your vids like the printStar ( i -1) to get a right angle, i feel like part 3 been bad any recommendations ??

[MohamedAhmed-rfbk]

This part (method calling another method) was the hardest one, I just don’t know what’s going on 💀, 2 days and I’m still blank. I didn’t get the multiplication table example and I couldn’t even do the last exercise

[MohamedAhmed-rfbk]

25:33, I don’t get why you passed width, how does that end up building a rectangle?

[conlinduffy]

How did that printTriangle() method pass in the last exercise? That was not a right leaning triangle? I cannot get mine to pass.

[syedtamimhassan]

I must thank you for all the hard work, man but i cant figure out the last two Exercise. I'll write a brief explanation on what I understood and what I didnt. I really hope i could get some help if you dont mind

[spyox]

does anybody know how I can print the Christmas tree from 1 to 5 without multiplying by 2

[baliDOTid]

my christmas tree code is scuffed but i made it work lol. what do u think about this:

public static void christmasTree(int height) {
// part 3 of the exercise
int start = 0;
int extraStars = 0;
while (start < height) {
printSpaces(height - start - 1);
start++;
printStars(start + extraStars);
extraStars++;
}
printSpaces(height - 2);
printStars(3);
printSpaces(height - 2);
printStars(3);
}