Java将高字节数组转换为int

/**
	  * 将高字节数组转换为int
	  * @param b byte[]
	  * @return int
	  */
	public static int hBytesToInt(byte[] b) {
	  int s = 0;
	  for (int i = 0; i < 3; i++) {
	    if (b[i]>=0) {
	    	s = s+ b[i];
	    } else {
	    	s = s + 256 + b[i];
	    }
	    s = s * 256;
	  }
	  if (b[3] >= 0) {
	    s = s + b[3];
	  } else {
	    s = s + 256 + b[3];
	  }
	  return s;
	}