Java 9에서 언제 InputStream의 readNBytes() 메서드를 사용합니까?

<strong>public int readNBytes(byte[] b, int off, int len) throws IOException</strong>

import java.io.*;
import java.util.stream.*;
import java.nio.*;
import java.nio.file.*;

public class InputStreamReadNByteMethodTest {
   InputStream inputStream = nputStreamReadNByteMethodTest.class.<strong>getResourceAsStream</strong>("Technology.txt");

   public void testReadNBytes() throws Exception {
      final byte[] data = new byte[10];
      inputStream.<strong>readNBytes</strong>(data, 0, 7);
      System.out.println(new String(data));
   }
   public static void main(String args[]) throws Exception {
      InputStreamReadNByteMethodTest t = new InputStreamReadNByteMethodTest();
      t.testReadNBytes();  
   }
}

<strong>"JAVA",</strong>