#Edit a json Object

1 messages · Page 1 of 1 (latest)

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

heavy kiteBOT
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west stump
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what have you got so far?:

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have you loaded the json file?

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ok and now what do you want to do with that HashMap?

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why do you even have a HashMap then?

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why are you putting the content of the Json into a HashMap and not stick to the returned Json from Json.read?

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?

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cant you tell me the reason for the HashMap?

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ok and you updating the values and now want to writ ethe content of the HashMap back to the file?

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in the json or in the hashmap?

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then you need to write it to the file back

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couldnt find a way to just edit one line

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in his tutorial

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but just wait for him ig

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you already pinged him

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and I think its night time for him

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I think thats because if writing in a file to java you would always need to write the whole file and cant edit just a single line without writing the old content as well

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it was smth like that

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yeah, opening for writing takes the longest time anyways

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So writing one line or ten shouldn’t really matter at this scale

jagged star
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Format the code next time

west stump
tidal dock
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yes

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write the whole hash map back out

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yep

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edit the hashmap

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okay so you have your hashmap<String, String[]>

west stump
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you need to get it to a Json object again

tidal dock
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HashMap<String, String[]> m = ...;

var array = m.get("example");
if (array != null) {
    array[3] = "2";
}
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so that will edit the array in your hashmap

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(the way you are describing it)

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then just write it back out

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override your json with the HashMap
Hm?

west stump
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the write methods accepts an Json object

tidal dock
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so how to go from HashMap<String, String[]> -> Json?

west stump
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^

tidal dock
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(have to acknowledge that HashMap<String, String[]> is a bit cookoo as an application model)

west stump
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btw cant you edit the content in the Json object directly?

west stump
tidal dock
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well - do you have a write method already?

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can you show it

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I said write

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not read

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okay

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so use Json.objectBuilder() and Json.arrayBuilder()

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loop over your hashmap, and for each entry add to the builders

west stump
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dont you have a of method for map?

tidal dock
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if they have a method to at least encode a String[] that will work

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but doing the normal loop I think is what they should do

tidal dock
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just to talk about a small thing - json, as a data format, is especially poorly suited to "update just one part without writing the whole thing out again"

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i'm sure its doable in some way

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but in general your mode of interaction is going to be "load thing into memory", followed by "edit it", then "write out again"

west stump
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check the github/javadocs ig

tidal dock
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a JsonEncodable is an interface which contains a toJson method

tidal dock
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Use Json.arrayBuilder() and a for loop

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if you can write a method that just does String[] -> Json we can make use of that to do the whole hashMap

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okay

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focus on this

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static Json stringArrayToJson(String[] strings) {

}
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Use Json.arrayBuilder() and a for loop

tidal dock
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This is a bad habit

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Test your code

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It's close

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You need to use an object builder

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But please don't ask if something is good when you yourself have not tried running it

tidal dock
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@atomic kernel hmm wait

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ObjectBuilder isn't public

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use JsonObject.Builder and Json.objectBuilder()

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not ObjectBuilder directly

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notice how ObjectBuilder is in the internal package?

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yeah