Re: Help w/ primitive type byte

From:

"Bryan" <BTRichardson@gmail.com>

Newsgroups:

comp.lang.java.programmer

Date:

8 Dec 2006 20:22:17 -0800

Message-ID:

<1165638137.245169.24330@n67g2000cwd.googlegroups.com>

Hi Arne,

The code works fine. I'm looking for an explanation of how it works.

Thanks for the help with the float question!

Bryan

On Dec 8, 7:29 pm, Arne Vajh=F8j <a...@vajhoej.dk> wrote:

Bryan wrote:

I was wondering if anyone would be willing to help me understand what
is going on with some code that I came across. It has to do with the
primitive type byte. What it's modeling basically is a register in a
device such as a remote terminal unit (RTU). The register holds a word
(byte[2]). Can someone explain what is going on with the code below?

  private byte[] m_Register = new byte[2];

  public final synchronized void setValue(int v) {
    m_Register[0] = (byte) (0xff & (v >> 8));
    m_Register[1] = (byte) (0xff & v);
  }

  public final int toInteger() {
    return ((m_Register[0] & 0xff) << 8 | (m_Register[1] & 0xff));
  }Does the code not work as it should ?

Or are you looking for an explanation of the operators used ?

One more question... how would I go about storing a floating point
value in a similar register?Float.floatToIntBits will convert a float t=

o int and then you can

convert the int to 4 bytes using technique similar to above.

Arne- Hide quoted text -- Show quoted text -