Here you can find the source of cutBytes(byte[] bytes, int pos, int length)
public static byte[] cutBytes(byte[] bytes, int pos, int length)
//package com.java2s; public class Main { public static byte[] cutBytes(byte[] bytes, int pos, int length) { if (length < 0) { return null; }/*from w w w . ja va 2 s .c o m*/ byte[] dest = new byte[length]; System.arraycopy(bytes, pos, dest, 0, length); return dest; } }