Adding non printable chars to a string in Java?

Question

I need to add some non printable chars to a string in java so it can be sent down a tcp pipe. the chars mean something to the protocol I am using (record separator and end of message respectively)

what is the best way to go about doing this?

Ideally I'l like to refer to them as constants so that I can use string concatonation/stringbuilder/string.format to add them where required, without having to type them out.

For the curious the chars I need are ASCIIx1E (Record separator) and ACSIIx03 (End of Text).

dfa · Accepted Answer · 2009-07-22 11:47:01Z

9

public final class ProtocolConstants {
    public final char RECORD_SEPARATOR = 0x1e;
    public final char END_OF_TEXT = 0x03;

    private ProtocolConstants() {}
}

something like that?

answered Jul 22, 2009 at 11:47

dfa

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McDowell · Accepted Answer · 2009-07-22 12:15:48Z

7

If you wish, you can write these as Unicode literals (in chars or Strings):

final String endOfText = "\u0003";

I am assuming that you don't literally want ASCII for a byte-based protocol (the chars are still 16 bits).

answered Jul 22, 2009 at 12:15

McDowell

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Comments

newacct · Accepted Answer · 2009-07-22 18:41:12Z

1

You can add any chars to a Java String. But a String is probably not what you want if you just want to transmit binary data. Consider using a byte[] or some other byte-oriented interface.

answered Jul 22, 2009 at 18:41

newacct

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