Buffered Streams

public class Main {
  public static void main(String[] args) {
    java.nio.file.Path p = java.nio.file.Paths.get("data.bin");
    try (java.io.BufferedInputStream bis = new java.io.BufferedInputStream(java.nio.file.Files.newInputStream(p))) {
      int b;
      while ((b = bis.read()) != -1) {
        System.out.print(b + " ");
      }
    } catch (java.io.IOException e) {
      System.out.println("Error: " + e.getMessage());
    }
  }
}

public class Main {
  public static void main(String[] args) {
    java.nio.file.Path p = java.nio.file.Paths.get("out.bin");
    try (java.io.BufferedOutputStream bos = new java.io.BufferedOutputStream(java.nio.file.Files.newOutputStream(p))) {
      for (int i = 0; i < 5; i++) {
        bos.write(i); // write 5 bytes
      }
    } catch (java.io.IOException e) {
      System.out.println("Error: " + e.getMessage());
    }
  }
}

public class Main {
  public static void main(String[] args) {
    java.nio.file.Path in = java.nio.file.Paths.get("data.bin");
    java.nio.file.Path out = java.nio.file.Paths.get("copy.bin");
    try (java.io.BufferedInputStream bis = new java.io.BufferedInputStream(java.nio.file.Files.newInputStream(in));
         java.io.BufferedOutputStream bos = new java.io.BufferedOutputStream(java.nio.file.Files.newOutputStream(out))) {
      int b;
      while ((b = bis.read()) != -1) {
        bos.write(b);
      }
    } catch (java.io.IOException e) {
      System.out.println("Error: " + e.getMessage());
    }
  }
}