Representing bytes in hex

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4 total messages Started by Luke Vanderfluit Fri, 12 Jan 2001 06:23

#296

Author: Luke Vanderfluit
Date: Fri, 12 Jan 2001 06:23

15 lines
1577 bytes

Hi,

Who can tell me how to represent my output in hex.
I want to read a number of bytes from a file, then replace them with
other bytes.
I can read the bytes OK, but how to represent them in hex?

L

--
  Luke Vanderfluit

  Phone 61 8 8556 6112

  Aldinga Beach, South Australia

Re: Representing bytes in hex

#297

Author: Antti S. Brax
Date: Fri, 12 Jan 2001 07:21

16 lines
1795 bytes

Luke Vanderfluit <luke@chipcity.com.au> wrote in comp.lang.java.programmer:
> Who can tell me how to represent my output in hex.

	Use Integer.toString(int radix) where radix is 16.

> I want to read a number of bytes from a file, then replace them with
> other bytes.

	Does this have something to do with your problem of getting
	a hexadecimal representation of a byte?

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Re: Representing bytes in hex

#299

Author: Jeff Robertson
Date: Fri, 12 Jan 2001 14:27

29 lines
2066 bytes

In article <3A5EA2DA.E5EEED27@chipcity.com.au>,
  Luke Vanderfluit <luke@chipcity.com.au> wrote:
> Hi,
>
> Who can tell me how to represent my output in hex.

Either use Integer.toHexString(), as suggested, or do something like
the following:

    System.out.print( Character.forDigit( b >> 4 & 0xf, 16) );
    System.out.println( Character.forDigit( b & 0xf, 16) );

The main advantage of doing it this way is that the above always prints
exactly 2 digits, whereas toHexString() will vary.

> I want to read a number of bytes from a file, then replace them with
> other bytes.
> I can read the bytes OK, but how to represent them in hex?

As someone else pointed out, these are two separate issues. Please
explain further.

--
"I'm a snotty E-commerce server software coder." - Joona Palaste, c.l.c.
http://www.geocities.com/jeff_robertson

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Re: Representing bytes in hex

#298

Author: Paul Murray
Date: Fri, 12 Jan 2001 21:13

17 lines
1764 bytes

"Luke Vanderfluit" <luke@chipcity.com.au> wrote in message
news:3A5EA2DA.E5EEED27@chipcity.com.au...
> Hi,
>
> Who can tell me how to represent my output in hex.
> I want to read a number of bytes from a file, then replace them with
> other bytes.
> I can read the bytes OK, but how to represent them in hex?

Integer.toHexString()

Remember to zero-fill them.

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