cant call method despite it being there

[lyric python]

<@&987246399047479336> please have a look, thanks.

Here is an AI assisted attempt to answer your question 🤖. Maybe it helps! In any case, a human is on the way 👍. To continue talking to the AI, you can use </chatgpt:1108714622413963314>.

Without seeing the specific code, it is difficult to determine the exact cause of the error. However, there are a few common reasons why this error might occur:

1. The method getFee() may not be defined or accessible in the Baby class. Make sure that the method is properly declared and implemented in the Baby class.

2. The method getFee() may be defined with different parameters or return type in the Baby class compared to where it is being called. Check that the method signature matches in both places.

3. The instance of the Baby class where you are trying to call getFee() may not be properly instantiated or initialized. Ensure that you have created an instance of the Baby class and assigned it to a variable before calling its methods.

4. There could be a typo or misspelling in either the method name or its invocation. Double-check for any spelling errors or inconsistencies.

If you provide more specific code examples, I can help pinpoint the exact issue causing the error.

[spiral chasm]

apparently u dont have it there

[soft crystal]

show the error please

[spiral chasm]

please share the baby class and the full error message

[lyric python]

cant call method despite it being there

Changed the title to cant call method despite it being there.

[spiral chasm]

perhaps it also just returns the wrong type

hard to tell. just show the error

and the baby class

[cursive hazel]

ok hold on

the error is cannot find symbol

[native slate]

just show us the full error log pls

[spiral chasm]

and the full baby class please

[cursive hazel]

dont know how

[cursive hazel]

ok

[spiral chasm]

screenshot the entire error message the IDE shows u please

it likely says more than just "cannot find symbol"

which u omitted

put ur mouse over the red lines, then u get a popup with the error message

either type it out fully or give a screenshot

[spiral chasm]

u can just drag drop the file to discord

[cursive hazel]

wasnt successful

[cursive hazel]

i'll try to type it

[spiral chasm]

screenshot of the error message please

[cursive hazel]

cannot find symbol.....symbol: method getFee().....location: variable b of type Baby

is it because of the arraylist baby?

[native slate]

this isnt helpful at all

[spiral chasm]

can u please upload the full Baby.java and BabyCareCenter.java files

drag drop them here

[native slate]

how would we know without seeing the code

[cursive hazel]

let me try again

[spiral chasm]

thanks

[cursive hazel]

did it work?

[spiral chasm]

no

u uploaded entirely empty files

https://i.imgur.com/C7EKHXe.png

[native slate]

lol

I think you didnt save your files in your ide

[spiral chasm]

or that

hit ctrl+s in all ur files

[native slate]

lol

[cursive hazel]

ok i'll save them

[cursive hazel]

._.

[native slate]

which ide are you even using?

[cursive hazel]

19

do i need to save each class or one of them

[native slate]

all of them

[spiral chasm]

with IDE they meant the program ur using to write java in

majority of people use IntelliJ

it seems ur using sth quite old

[cursive hazel]

hold on .. what about manually copy the code?

[spiral chasm]

at this point, i suspect the issue is not the code u wrote

but that u didnt save

and ur IDE being too stupid to autosave

[cursive hazel]

netBeans

[spiral chasm]

cause its super old likely

yeah... netbeans

thats used by like 3% of java users

(for a reason)

[native slate]

and it cant find the method because it checks the saved file and not the edited not saved file inside the ide

[cursive hazel]

these 3% learnt java at uni like me

[spiral chasm]

did u save all files? is the issue still there?

[cursive hazel]

wow

[cursive hazel]

let me try

[native slate]

just a guess though

[cursive hazel]

wowwww ,its gone!

[spiral chasm]

if its still there, please locate the files on ur disk in ur explorer and drag drop them

ah perfect

🙂

[native slate]

lmao

[cursive hazel]

guess netBeanse going to give me headach

anyway thanks guys

quick question, if i remove x=0 ,and just put it as x;..is it correct

when its necessary to initialize variables ?

[worn pumice]

in case you're doing operations on them, when they're not primitives.

[cursive hazel]

can u explain more about " when they're not primitives."

[cursive hazel]

so is it ok in this case ?

[worn pumice]

int, byte, short, long, float, double, boolean and char

[cursive hazel]

so here x is not primitive ?

i guess its double

[native slate]

it is a primitive type

[cursive hazel]

so we have to initialize or?

[native slate]

no you dont have to

but if you have a reference type and do some operation on them you need to

primitive types have default values

[worn pumice]

primitives have a default value

[native slate]

and reference types are null by default

[worn pumice]

0 in this case

[native slate]

and you cant do operations with null

like calling a method

[cursive hazel]

ok ..u mean if i use variable type another class then i have to initialize cause it doesnt have default value?

[worn pumice]

Also to jump a bit ahead, you don't need that intermediary value. You can also do: list_b.stream().map(Baby::getFee).mapToInt(Integer::intValue).sum()

[native slate]

wouldnt introduce that yet

but its good to know that those exists

[worn pumice]

CustomType customType = new CustomType() @cursive hazel

[cursive hazel]

but u said we dont have to initialize the primitive type

[worn pumice]

@native slate indeed, a tad early, I just wanted to already mention the concept.

[cursive hazel]

that looks advanced

[native slate]

yeah, but here I was talking about reference types

[worn pumice]

Primitive types cannot be null

only Objects can be

[cursive hazel]

hmm is it related to class Object ?

[cursive hazel]

oh thats why we dont have to initialize them ?

[spiral chasm]

thats only the case for fields

[native slate]

there are two types of variables in java:

primitive:
  byte
  short
  int
  long
  float
  double
  char
  boolean

and reference types which are subclasses of Object
and if you have this for example:

public class Dog {
    // implementation
}

and use it like this:

Dog dog;

then its basically this:

Dog dog = null;

[spiral chasm]

local variables never auto initialize

[native slate]

yeah I simplify a bit

but tbh quite important to know

[spiral chasm]

fields do auto initialize for primitives as well

i guess my point is, the reason why init is necessary here is bc its a local var

not bc its a primitive

[cursive hazel]

lets say we are going to use this variable inside the main method ..to use it in a loop ..its gonna be same case here right ?cause its local?

[spiral chasm]

any variable that u didnt define in class-scope is local

class Foo {
  int x; // <- field

  public void foo() {
    int y; // <- local var
  }
}

[cursive hazel]

so we have to initialize it ..doesnt matter wither its primitive or not ?

[cursive hazel]

okay 👍

[spiral chasm]

yes

(before u use it)

u can split it into multiple lines. but u have to init it before u use/read it

int x;
...
x = 5;
System.out.println(x);

thats okay, unless u attempt to use/read x beforehand

[cursive hazel]

thats why sometimes we get errors when we use it without initialization ?

[cursive hazel]

is it a method?

[spiral chasm]

what?

[cursive hazel]

didnt get the use/read part

[spiral chasm]

if u attempt to read the value of the variable when its not initialized

int x;

System.out.println(x); // bad
int y = x + 1; // also bad
x++; // also bad

anything that would read what value is behind x wouldnt be allowed

[cursive hazel]

what is allowed then

[cursive hazel]

cause I've been doing these

[spiral chasm]

definitely not

u likely first initialized the variable

int x = 0;

ur question was about what if u dont initialize it

i.e. just int x;

gotta pay attention to the details 😛

[cursive hazel]

aha , is it a syntax error

[spiral chasm]

its a compilation error

[cursive hazel]

with alot of info ..how would i pay attention

[cursive hazel]

okay got it .. thx

[cursive hazel]

"it is necessary cause the variable wont just automatically start with a value like 0", here u mean that because its local ? like u said earlier?

[spiral chasm]

yes

[soft crystal]

It's a skill issue 🙂
You have to save