Me been me will not allow myself to write that much of a code for same functionality, I have two generic methods to do all the conversion work for me...
This method would convert any given numeric none floating, to byte array.
/** * Converts any given numeric value which is not floating, to byte array. <br> * <br> * {@link Byte}<br> * {@link Short}<br> * {@link Integer}<br> * {@link Long}<br> * * @param _value The value to parse * @return A byte array of the supplied value. */ public static byte[] toByteArray(Number _value) { int length; long value; if (_value instanceof Byte) { length = Byte.SIZE >> 3; value = (Byte) _value; } else if (_value instanceof Short) { length = Short.SIZE >> 3; value = (Short) _value; } else if (_value instanceof Integer) { length = Integer.SIZE >> 3; value = (Integer) _value; } else if (_value instanceof Long) { length = Long.SIZE >> 3; value = (Long) _value; } else throw new IllegalArgumentException( "Parameter must be one of the following types:\n Byte, Short, Integer, Long"); byte[] byteArray = new byte[length]; for (int i = 0; i < length; i++) { byteArray[i] = (byte) ((value >> (8 * (length - i - 1))) & 0xff); } return byteArray; }
This method would convert a byte array to a long value, according to the size of the array.
/** * Converts a byte array, to a numeric value. <br> * <br> * {@link Byte}<br> * {@link Short}<br> * {@link Integer}<br> * {@link Long}<br> * * @param byteArray The byte array with the value to parse. * @return The value which rests within the supplied byte array */ public static long fromByteArray(byte[] byteArray) { int length = byteArray.length; long value = 0; if (length > 8) throw new IllegalArgumentException("Array parameter length==" + byteArray.length + ". MUST be length <= 8"); for (int i = 0; i < length; i++) { value |= ((0xffL & byteArray[i]) << (8 * (length - i - 1))); } return value; }
If you have found this useful, +1 this...
As discussed here, perhaps I should have mentioned that this is a quick generic unified access to the conversion function, that SHOULD not be used with crazy ass repetitive loops...