then how can i replace a value inside it ? i have ...

# android

[Kevin Janvier Chinabalire]

then how can i replace a value inside it ?
i have this arrayList
[{
"aaa": "#FF7B5CC1",
"bbb": "000",
"ccc": "ghffh"
}]
val arrayList = Arrays.asList<MyModel>(newitem)
I want to replace a value inside it like replace "aaa": "#FF7B5CC1", to "aaa": "#000000"

let say i have `data class Mymodel(val aaa:String, val bbb:String,val ccc:String)
in my class i have val arrayList = Arrays.asList<MyModel>(newitem) how can i replace the value inside it ?