B4J Question Read file content, change sub-string, then save file with different name

[amorosik]

I would need to read the contents of an entire file composed not only of alphanumeric characters but also of control codes, replace some strings with others (of different length), and save the modified content on a file with a different name
Which instruction to read the file itself byte by byte?

 

[EnriqueGonzalez]

Which instruction to read the file itself byte by byte?

File.readbytes for all bytes
File.openinput with buffer and then you save with file.openoutput

Adn if you want to open as a string,
File.readstring

 

[Erel]

Why are you making duplicate threads???