What does this output mean ?

[glossy salmon]

i have a program that gives me an address like output even tho java isn't pointer-based language, so what is this output ?

it's something like this:

classname@4429dd3e.

[plucky sand]

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

[plucky sand]

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[rocky palm]

it's not an address, it's ClassName @ hashCode

[glossy salmon]

does it have an actual name ?

[rocky palm]

And it outputted that because you tried to transform the object into a string and java didn't know what to do

[rocky palm]

wdym

[glossy salmon]

like does it have an acronym ?

i know it's hard to understand me I'm kinda bad at explaining

[rocky palm]

hashcode ?

like I said in my first message

[glossy salmon]

so no matter what i do, the output will be a hashcode ?

[rocky palm]

no

you could try to directly print the name for example

instead of trying to print the whole object

or you could override toString

[glossy salmon]

yeah that's whay i thought using setters and getters

but I'm asking because it was a question on my quiz and i was so frustrated by it

thx btw you're a life saver

[rocky palm]

what was the question ?

[glossy salmon]

what is the output of the following program.

[rocky palm]

ah yes, it's ClassName@hashCode

A complete answer would be : "This problem would print out the default implementation of Student class, which would return ClassName@hashCode ie Student@4429dd3e"

[glossy salmon]

thank you so much

[cobalt moat]

@glossy salmon Technically it is called the "identity hash code"

hash code can be overridden

while java isn't a pointer based language, most classes have a defined "identity" associated with them

and that identity stays constant for the object's entire lifetime

you can squint and say "oh its the memory address!" but that isn't true since the jvm will shuffle things around and actual pointers change

right now the only kinds of objects are those with identity that are behind a reference

and primitive objects that do not have an identity and are not behind a reference (like int, double, etc)

in the future that will change, but its a far-ish future

where there will still be identity classes behind references

but also value classes, which are behind references but do not have an identity

and primitive classes, which work exactly like an int