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

问题

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

回答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);

来源：https://stackoverflow.com/questions/29508294/write-content-in-a-byte-array-to-a-file-and-read-the-byte-from-file-back-to-byte