String getBytes()

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eeh - 23 Apr 2007 04:09 GMT

Hi,

How to make b[0] to get 0xaa?

String s=""+(char)0xaa;
byte[] b=s.getBytes();
System.out.println(b[0]);<==result is not 0xaa

Thanks!

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Knute Johnson - 23 Apr 2007 06:25 GMT

> Hi,
>
[quoted text clipped - 5 lines]
>
> Thanks!

String str = "\u00aa";

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Knute Johnson
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Tom Hawtin - 23 Apr 2007 09:46 GMT

> How to make b[0] to get 0xaa?
>
> String s=""+(char)0xaa;
> byte[] b=s.getBytes();
> System.out.println(b[0]);<==result is not 0xaa

You seem to be confused between chars and bytes.

From API docs to String.getBytes:

"Encodes this String into a sequence of bytes using the platform's
default charset..."

What's the platform default charset? Anyone's guess. It's an utterly
pointless method. Always use a version with of the method that takes an
explicit charset. But what you usually want to do is to stick with chars:

String str = Character.toString((char)0xaa);
char[] cs = str.toCharArray();
System.out.println((int)cs[0]);

Tom Hawtin

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Lothar Kimmeringer - 23 Apr 2007 23:24 GMT

> String s=""+(char)0xaa;
> byte[] b=s.getBytes();

Try s.getBytes("8859_1"); instead

> System.out.println(b[0]);<==result is not 0xaa

Then it should.

Dependent on your original problem, this might still not
be the solution of what you intend to solve.

Regards, Lothar

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String getBytes()

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