How to save regular array data on disk instead of memory?

[unborn berry]

Short Question Above.

Long Question:
How do I save data from arrays on a disk and access it on different java programs?

[spring swift]

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

[spring swift]

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[fallow apex]

What's the difference between the short and long question 🤔
Which format do you want to save it ? What does this array hold ?

[unborn berry]

Format?

And the arrays in question hold regular variables, and String

[fallow apex]

Wdym regular variables

[unborn berry]

Int, bool, float, that kind of stuff

Forgot what those specific variables as a whole are called tho

[lament sorrel]

its important to know, cause it will be entirely different depending on what it contains

[fallow apex]

Why does your array hold several types at the same time?

[lament sorrel]

essentially, u need to transform ur array (with all its contents) into some form of text

and then read it back

thats not trivial

[unborn berry]

No, ofc it will be only one data type. Lets say.. Int

[fallow apex]

Raw text, json, etc ?

[lament sorrel]

there are generally two paths u can go:

• do u want a file that is readable by humans? (open with text editor, read and edit ...)
• do u want a file thats not readable by humans? (open with text editor and its just gibberish)

[unborn berry]

Ill go for the readable option

[fallow apex]

If you just want to save it to raw text, take your array, convert it to string and write it

[lament sorrel]

the first option leads u to something like JSON, for which u need a framework like Jackson
the second option leads u to java serialization or protobuf

for simple cases, u can also do it manually

[spring swift]

@lament sorrel

While we appreciate all efforts to help individuals, when multiple people join a conversation it can often get confusing for those asking for help. Members may be trying to lead someone down a particular thought process to get to the answer and interrupting can break this.

As a general guideline, try to avoid interrupting ongoing help scenarios unless:
• You feel incorrect information is being given.
• The question has subjective answers.
• The original helper is no longer responding.

You can of course always add additional information after the initial problem has been solved.

Alathreon • used /tag id: interrupt reply-to: @Zabuzard · Jan 11, 2023, 1:00 PM

[lament sorrel]

all in all, we have to see an example of what u want to save. we need to see how complex it is

[unborn berry]

It's just a basic int array man

[lament sorrel]

just ints? nothing else? no doubles? no strings?

[unborn berry]

Im a noobie in java, still dont get how to set up frameworks

[fallow apex]

Convert it to a string with a loop, write it to a file

[lament sorrel]

1D array or 2D or different?

[unborn berry]

Yeah its a little practice thing

Just array. 1D

[fallow apex]

It's 4 lines

[lament sorrel]

as an example

suppose u have an array like

[fallow apex]

Please zabu

It's horrible

We are constantly stepping on each other foot

[lament sorrel]

int[] values = { 4, 2, 321, 0, 12 };

u could save it as

4,3,321,0,12

[unborn berry]

After I do turn it into a file, how do i retrieve the data?

[fallow apex]

Read the file,
If you wrote int separated by space, split it, if you wrote on each line, read the lines, then parse each Integer then put them in an array

[unborn berry]

I think i need to see code to understand the process better

[fallow apex]

Files.readString(path) this method will read a file as a string

If the file is like
45 654 886
You can then .split(" ") to get each value

Then convert them

[unborn berry]

So for example

Files.readString(System/Onedrive/Documents/RandoAhhProgram.java)

And then parse that to an array somehow

[unborn berry]

What this does is break the string* apart after every whitespace?

[fallow apex]

You probably don't want to read a java program 🤔

[fallow apex]

Yes, it will return an array of string split by spaces

[unborn berry]

Oh sorry meant to use .txt

[fallow apex]

And it's Files.readString(Path.of("the path"))

Also do you know List ?

[unborn berry]

Arraylist? Familiar with the name. Arrays in Arrays, yes?

Still dont know how it works

[fallow apex]

Right

[unborn berry]

Unrelated topic: whats the beef between u and Zabuzard??

[fallow apex]

And for writing, you can use Files.writeString(Path.of("the path"), "foo bar")

[unborn berry]

foo bar

Whats that

[fallow apex]

Nah it's just that two people activelly helping is a mess

[fallow apex]

Explained here

[unborn berry]

Ahh ok

[fallow apex]

A string

Here it will write foo bar

[unborn berry]

Wait so i generate a file, with the string foo bar

Whats the file name going to be??

[fallow apex]

the path

[unborn berry]

So from what I read above,

Files.writeString(Path.of(System/Onedrive/Documents/Ehh.txt),"golden horseshoe crab");

Will generate the file Ehh.txt with the string "golden horseshoe crab" without fail

In that path

Alright, i got one thing down

Bonkers! In a good way

[fallow apex]

It may fail because of a bunch of reasons because of how windows or your favorite os works, but yes

[unborn berry]

will do, thanks!

anyways, time to sleep