java - write content in a byte array to a file and read the byte from file back to byte array

Question

How can write content in a byte array to a file and read the byte from file back to byte array without changing the content written before. in java

Answer 1

There are two methods for exactly this, in Files

final Path path myFile = Paths.get("path","to","file");
final byte[] toWrite = ...

Files.write(myFile, toWrite, StandardOpenOption.CREATE_NEW);

final byte[] read = Files.readAllBytes(myFile);

assert Arrays.equals(toWrite, read);