elevator

[celest kite]

Hey! I am really new to coding and my professor isn’t really teaching this class (Object Orienting Programing Java Script) for people with no experience even though he said he was going to do so it’s a big frustrating. During the lectures, he’d always reference stuff he taught in past semesters in C and C++ and doesn’t go over anything too well. So now half the stuff I’m doing I don’t really understand it’s all like jibberish to me so bare with me. We are supposed to create an object in one class use some private stuff so that people don’t mess with it (?) then use another folder class thing to use the object in and make the elevator go up. I have attempted this but I have no idea what I just wrote or if I’m even on the right track any help would be greatly appreciated. Here are some pictures:

[tepid temple]

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[high pumice]

can you explain what you're trying to do here pleas

theres a few syntax errors here and there but walk me through the logic rq

[celest kite]

Ah well I thought cuz I did the goUp in the other one it’ll mean that it’ll go up to the net level but if the input was wrong then it’ll display the error message then show level cuz there’s only three floors

So like in the second one I did goUp = + floor I thought that will make it go up

[high pumice]

ok i understand

but here

so in an if statement, java checks to see if the thing in the parentheses is true

but you put the boolean truth which you set to true in the parentheses, so it's always gonna run the code inside the if statement

also another note, the else in an if statement doesnt have a parentheses because it's going to run if the condition of the if statement is false

so to accomplish what you're trying to do you would need something that says if input.nextInt() is between 1 and 3, then goUp() and print "Going up!"

otherwise, displaycurrentFloor() and print "Can't proceed"

[sinful ocean]

Java, not JS

OOJS is different

[high pumice]

so..

if(0<Floor<4){
 goUp();
 System.out.println("Going up!");
}
else{
 displaycurrentFloor();
 System.out.println("Can't proceed");

[sinful ocean]

( Chained comparisons don't work in java like in python )

[celest kite]

Oh I thought that’s what it was cuz that’s the course title 😭😭😭😭

[sinful ocean]

But that's also a thing

And it's completely different

[celest kite]

Alright I’ll try and find some help somewhere else then thank you!

[sinful ocean]

This is the place lol

But you just got the name wrong

[celest kite]

Oh can you help me out then?

[high pumice]

yes

[celest kite]

Does this work?

[high pumice]

yes it works but its less readable

but yea thats good

[sinful ocean]

Are there requirements for the elevator class? It looks overengineered

[high pumice]

you cann also just declare floor in line 26 rather than line 16

[sinful ocean]

define*

And yeah that looks cleaner in my opinion

[celest kite]

We’re supposed to tell it to go up up up up until it reaches the very top then do down. I donnu tho he basically ran through another example with the same structure and he wanted us to set this same way I think? He said we had to use goUp and goDown and displayCurrentFloor() which honestly I donnu if I’m really doing

[sinful ocean]

all three should be methods

Because go is a verb yes?

[celest kite]

I donnu what a method is 😅

[sinful ocean]

We're telling the computer to do stuff

[sinful ocean]

Function inside a class is called method

[celest kite]

But how do I do that

[sinful ocean]

How do you define the methods?

Very similar to main

Just change the name and String[] args to whatever data you pass in

And the void to whatever is returned. (For you example no change)

[high pumice]

you're using methods when you say goUp()

[celest kite]

What do you mean by data you pass in

[high pumice]

a method is basically a block of code with a purpose

[high pumice]

parameters that go in the parentheses of the metohd

[celest kite]

What’s that

[high pumice]

so your setFloor method has a parameter

which is an int

and so sometimes methods take parameters as an input

sometimes they dont need one

[celest kite]

But what happens when they do have a parameter

[high pumice]

so basically what methods does your professor say you need to have

[celest kite]

goUp goDown displayCurrentFloor

I think

[high pumice]

you use the parameter as needed to make the method do what it needs to do

as seen here the method addNumbers has 2 int parameters

and its purpose is to add numbers

so the 2 ints that it receives as input, it adds them, and then outputs their sum

makes sense?

[celest kite]

Ok that kinda makes sense

[high pumice]

ok so with your goUp method

if i did this i would have it take an int parameter

representing the floor they would like to go to

and then set your class variable currentFloor to the parameter

it doesnt really need to be goUp and goDown it can just be changeFloor

unless he specifically said you need one method for going up and one for going down

[celest kite]

oh well I think he wants the elevator to go one up at a time so like it can’t skip from 1 to 3 and when you try to go up on third it’s supposed to display an error message

[celest kite]

Alright this is what I got now

Donnu if this is closer or farther away from what I need 😅

[high pumice]

replace this with
System.out.println("Currently on floor " + Floor);

dont you wanna change the value of currentFloor as well

[celest kite]

👍

[high pumice]

i gtg i'll be back in 25 mins

[celest kite]

What does that mean

Alright!

Also made a couple changes

[sinful ocean]

You need ro step back and learn the cores of java

Only following school/college curriculum is not a good way to learn fast

[celest kite]

Dawg that’s the point of going to school wym 😭
I’m not tryna learn fast or anything this was supposed to be intro level stuff but the course material definitely doesn’t cover the very basics and the professor doesn’t help as much as he should and it’s an online class so it’s hard to make friends
Besides this is due tomorrow I’m not stepping back 😂

[sinful ocean]

I never made friends

[celest kite]

If you wanna help me I’ll very much appreciate it cuz I’ve been so lost for the past 2 weeks if not cuz you think I’m an idiot trust me I know aha

[sinful ocean]

No I also have to do things you know?

[celest kite]

Then go do them

Have fun!

[sinful ocean]

👍

[high pumice]

hes right

theres an order in which to learn things

jumping around will lead to a lot of confusion

[celest kite]

I know he’s right but I can’t really go back rn cuz that’s the structure of the course wish it was better but 🤷‍♀️. I’m just trying my best