byte類型與double類型的互相轉化

byte類型轉化成double類型

public static double convert(byte[] data) throws IOException {
		DataInputStream dis = new DataInputStream(new ByteArrayInputStream(data));
		double num = dis.readDouble();
		dis.close();
		return num;
	}
           

double類型轉化成byte類型

public static byte[] convert(double num) throws IOException {
		byte[] data = null;
		ByteArrayOutputStream bos = new ByteArrayOutputStream();
		DataOutputStream dos = new DataOutputStream(bos);
		dos.writeDouble(num);
		dos.flush();
		data = bos.toByteArray();
		dos.close();
		return data;
	}