Price of apples

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On the agrarian planet Appleside, the vast majority of inhabitants make most of their income selling the best apples on this side of the Galaxy to Federation merchant ships and visiting tourists. Let's enter a business relationship with an abstract buyer. Considering the fact that the season is ending and we must somehow survive the winter: write a method that raises the price of apples!

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Lunita

Level 4

2 February, 20:53

HINTS: It's only 1 line of code, it's a sum involving applePrice and you have to remember this: <<If a method is declared with the keyword "static", then to access the class variable, you must use Classname.variableName

Thi Java Developer

21 February, 18:54

Thank you, Lunita! 😅

MrWaito

Level 8 , Santo Domingo, Dominican Republic

11 March, 22:22

Thank you for the hints 💪

jerry

Level 16 , Earth C-137, Thailand

4 August 2021, 09:37

WHY and HOW Apple.applePrice = 50 ? MY understanding: 1. applePrice = 0 2. apple1.addPrice(50); increase it to 50. // its literally ADDS price to our 0 3. apple2.addPrice(100); increase it to 150. // ADDS 100 to our new value. ` so its basically 2 actions: first, it takes 0 and add 50 from apple1 so its not 0 anymore but 50. second, to our 50 it adds value of apple2. the static thing was okay but "the formula" of this apple price took me 2 martian weeks to understand... ``correct me if u dare Hope u got it Brazzzer or SIS stay tuned ~btw do u want develop an app?

Elias Daniel Hung

Level 4 , Caracas

16 July 2021, 23:57

If I can, you can, if you don't understand I'll help you, the path is easier together ...

RUBEN CABRERA

Level 1 , Koxhausen, Germany

Expert

29 August 2021, 17:27

Hello Elias, I would like to understand more about static methods and static fields, I try to complete this task but I have some errors, I read some more documents even Java tutorial but I think I need more clearly explanation.

Aron

Level 18

30 June 2021, 19:13

As the applePrice variable is static meaning that it belongs to the Apple class not its instances. The instance Objects (apple & apple2) can access the static variable via the class name i.e Apple.applePrice

Mike Bayley

Level 4 , Fishponds, United Kingdom

3 August 2021, 20:25

Thank you Aron. This one was particularly confusing to me until I read your comment 🙃

Mateusz

Level 29 , Poland

21 August 2020, 12:37

Could anyone explain to me what the reason for making the addPrice method static is? Isn't it better to make it non-static? And similar question: why the class Apple is in the class Solution? Isn't it better to create the class Apple in a separate file and make it non-static?

Andrei

Level 41

4 September 2020, 12:03

Good question, maybe someone can answer!

Daniel

Level 9 , Vienna, Austria

4 May 2020, 00:41

I'll give you a hint. I hope you'll figure it out. "public static int applePrice = 0;" has to be called using the class name to be "seen" because it belongs to the Class (it's static):

Apple.applePrice

and "int applePrice" taken by the method is called simply like this:

applePrice

So, bottom line:

initialized int applePrice + intTheMethodTakes = initialized int applePrice;

or more simple

initialized int applePrice += intTheMethodTakes;

Liew

Level 10

16 April 2020, 03:53

very easy, you just need to know how to link to get the static variable, check out the lessons if you do not get it.

Gregory

Level 4 , Netherlands

26 January 2020, 07:15

super lost

Michael Scanlan

Level 4 , Kalispell, United States

26 January 2021, 23:43

Me too, I have no idea what the want with this one

Alec Jensen

Level 5 , Arlington, United States

20 December 2019, 17:58

definitely confused when this did not meet all requirements. The very last requirement is the one it did not pass. "addPrice method should increase the cost of apples by the passed-in value." any help?

Andrei

Level 41

4 September 2020, 11:57

I think the sum displayed should be 150.

Brandon Nicolle

Level 5 , Edmonton, Canada

17 August 2019, 19:40

I went through this code and it's definitely helping me understand some of the class functions. Can I please get a simple explanation on why += gives me 150 but = gives me 100? Why does the += operator call both of them?

Justin Smith

Level 8 , United States

20 August 2019, 04:58

The += operator adds whatever value to the existing value, whereas the = will overwrite completely.

Talha

Level 5 , Lahore, Pakistan

20 August 2019, 11:42

a += a; is the same as a = a+a; it'll ad the value on left to the value on right

Jimmy Phan

Level 7 , Atlanta, United States

18 October 2019, 16:30

A bit confused on the operators as well. I thought my code was way off due to a little += and = x + x differences

Daniel

Level 9 , Vienna, Austria

4 May 2020, 00:50

You add the value from the right to the value of the left. The question is who a from the left is, not who a from the right is. So lefta is lefta + righta NOT righta is lefta + righta. It that would be the case then you would talk about who righta is. Say you have valueOfA and valueOfB. valueOfA is valueOfA + valueOfB or valueOfA += valueOfB. You transfer the value from the right into the value of the left. I hope that makes sense.