Help With Constructor Error

[rigid sequoia]

Implicit super constructor Bird() is undefined. Must explicitly invoke another constructorJava(134217871)

I get this error and i dont know how to fix it lol

[paper musk]

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

[paper musk]

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[rigid sequoia]

this is my file

this is Bird

the parent

[thorny orbit]

when you inherit a class, you must call the parent constructor

[rigid sequoia]

i call the parent constructor inside the child constructor?

[thorny orbit]

where ? that's not what I see

[rigid sequoia]

no im asking if thats what i should do

[thorny orbit]

yes that's right

you must call it

always

[rigid sequoia]

just Bird()?

or super.Bird()

or something like that

[thorny orbit]

super(...)

[rigid sequoia]

ah

god damn it

[proper belfry]

and it should be the first line as well(not sure if they changed that?)

[rigid sequoia]

i did everything else right on the exam

but im getting a 0 because my code didnt compile

[thorny orbit]

yes, currently it should be the first line

[rigid sequoia]

do i pass the parent variables inside?

the constructor

[thorny orbit]

yes

you need to understand why you need to do that at the first place

let's say you don't call it

[rigid sequoia]

then those variables will be null

[thorny orbit]

then the parent constructor doesn't construct it, so every field is null, and everything that should have been done isn't done, so now you have an object in an invalid state

so java ensures that you call it

always

in fact it ensures that you have at least one constructor too

and this even if you don't inherit any class

since if you don't inherit class

java will make you inherit Object

and will add a default constructor

[rigid sequoia]

the thing im confused about is what specifically do i put inside the super(), because my child constructor wasn't passed anything from the parent

[thorny orbit]

which will contain a default super()

[thorny orbit]

wdym

[thorny orbit]

you need to pass a name and winglength

[rigid sequoia]

my parent constructor takes 2 arguments

[thorny orbit]

yes

then pass them

[rigid sequoia]

no but

i dont just want to pass two arbitrary arguments

like "mike" and 20

[thorny orbit]

then add parameters to Penguin constructor

so now you have three parameters

[rigid sequoia]

the problem is that the assignment didnt say that

which is why im confused

[thorny orbit]

ah ?

[rigid sequoia]

yeah penguin only took 1 arg

and Bird takes 2

[thorny orbit]

can I see the assignment ?

[rigid sequoia]

it was an inclass test

so i dont have the paper

but im certain

[thorny orbit]

ah

[rigid sequoia]

but you explained it to me now

so i know for next time what to do

[thorny orbit]

then talk to your teacher when you will get your copy

[rigid sequoia]

ill let you know if i get an answer

thanks a bunch

[thorny orbit]

👍