Java I/O How to - Create new file and append byte array to it with java.nio.file.Files

Question

We would like to know how to create new file and append byte array to it with java.nio.file.Files.

Answer

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
//from   w w  w . j  a v a  2 s .c  o  m
public class Main {

  public static void main(String[] args) throws IOException {
    Path path = Paths.get("/users.txt");
    byte[] contents = Files.readAllBytes(path);

    Path newPath = Paths.get("/newUsers.txt");
    byte[] newContents = "aaa".getBytes();
    Files.write(newPath, contents, StandardOpenOption.CREATE);
    Files.write(newPath, newContents, StandardOpenOption.APPEND);
  }
}