Modifying a text file in Android

[glv]

Hello @a_random_cat,

This will help us help you:

Guidelines—Asking Questions

Summary (TL;DR) Ask complete questions to get better answers! Be specific. For example: I want to load an image. I tried using createImg() , and I expected the image to be on canvas, but what happened instead was the image showing up below the canvas. Isolate your problem and work in small steps. Share only the code directly related to your problem if it is part of a bigger project, and if something isn’t working, try the smallest code that could do the thing you want. Can we run your code …

Working example to extract string from array:

String [] lines = loadStrings("mac.txt");

printArray(lines);
println();

String awewo = lines[0].toString();
println(awewo);

println();

mac.txt file contents:

aa:bb:cc:dd:ee
https://www.processing.org
https://discourse.processing.org/t/guidelines-asking-questions/2147
https://stackoverflow.com/help/minimal-reproducible-example
500.7
12

Console output on Processing JAVA:

References:
https://processing.org/reference/loadStrings_.html
https://stackoverflow.com/help/minimal-reproducible-example < This is in the Guidelines

:)