Putting a null character in a String?

Hi,
I need to send a null character through a nio channel. Specifically, it needs to be decoded from a String into a byte array. Can I append a null character to a String so that getBytes() method will return it? Thanks,
ranko

Thanks, I tried that but it doesn't work. I also
tried appending '\0' and an uninitialized character
which should by default have a value of a null
character. I tried creating a String out of a char
array that has one element containing a null character
but that did not work either. I guess that since null
characters end the String, you cannot actually add
them to the body of the String. Or is there a way?FYI, strings aren't null-terminated in Java.

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Problem to put a special character in a string

I read a file that contains some special characters.
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8D is "reverse linefeed" in unicode: http://www.unicode.org/charts/PDF/U0080.pdf
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JCO.Server appends null character to string

I am a complete SAP and JCO newbie so I'll try making as much since as I can, given the fact that I'm not familiar with SAP terminology and technology. I've been lent as a developer to another group which needs a legacy application rewritten. The application processes a RFC and decrypts the RFC encrypted payload and returns it along with a status code.
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metadata.addInfo(Constants.PARAMETER_ENCRYPTED,   JCO.TYPE_STRING, 255,   0, 0, JCO.IMPORT_PARAMETER, null);
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protected void handleRequest(JCO.Function function)
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I seem to have made progress. If I define the parameter type as JCO.TYPE_CHAR instead of JCO.TYPE_STRING, it works:
metadata.addInfo(Constants.PARAMETER_DECRYPTED,   JCO.TYPE_CHAR,   255,   0, 0, JCO.EXPORT_PARAMETER, null);
That is the only change I made. I'm still setting the parameter value as java.lang.String. I hope this won't cause issues elsewhere. I was also able to change the field definition and set it as a byte array. However, that had the problem of having to define the exact length of the byte array in the field metadata otherwise the remaining bytes would appear as null bytes on SAP side.

Save null character to excel

Because MS Excel cells expect null terminated strings, I'm losing data when writing to Excel using active X from LabVIEW. What I am doing is typecasting an array to a string, and storing that string in a single Excel cell. But, if that string has a null character, all data after it is lost. Has anyone overcome this, and if so, how? The reason I want to do this is because my Excel spreadsheet is formatted in the following way
run1, set1, graph1 array, graph 2 array...graph10array
run 1, set 2, graph1 array, graph 2 array...graph10array
run2, set 1, graph1 array, graph 2 array...graph10array
run n, set n,graph1 array, graph 2 array...graph10array
This allows me to search for "run n, set n" and get all the corresponding graph data very easily. Also, unfortunately, using a database is not exactly an option .
CLA, LabVIEW Versions 2010-2013
Solved!
Go to Solution.

Matt,
Thanks for your response. The first two are customer driven. Their old format was in a DB and they want to keep that format, but move to excel so they can access other data visually from within Excel. If I was to put the graph stuff in a separate file, i'd then have to map to other files, check to make sure the files are there, etc.
Encoding and reencoding strings crossed my mind. However, this could potentionally cause "unencoding" of something I don't want to be unencoded. For example, let's say I replace all null characters with a, but then there is an a in the typecasted string which I don't want replaced. It will be replaced anyways. Is there a way around this? I'm thinking maybe do something like replace a null character with the ascii characters NULL. Then use a regex to search and replace.
The last one would work and I may just map the data to columns on a different sheet and write all the points.
Matt W wrote:
Here's some ideas
Option1: Don't use excel use tdms instead, combine run and set into the group names, and put the graph arrays into channels, this should be much faster, and easier to deal with
Option2: Is there a reason a self contained database wouldn't work. Like the SQLite API for LabVIEW
Option3: Reencode your strings so they don't contain \0, then unencode them when you read them.
Option4: Change your format (each sample from the graphs goes into it's on cell)
CLA, LabVIEW Versions 2010-2013

Match Pattern does not function properly when searching for a null character

I'm using Match Pattern to extract a null terminated string from a response I'm getting from a device on a serial port. The VI is attached and below is a screenshot of the block diagram.
It works just fine with index set to 0, 1, or 2. When index is 3, I get the output shown below.
Why is Match Pattern not finding the null character?
Thanks!
Solved!
Go to Solution.
Attachments:
Grab Nullterm String.vi ‏15 KB

I'm a dope, need to remove the wire from the Offset control to the Match Pattern control.
DUH!

How to get a set of character within a string?

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Database Version 11.2.0.3
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ANR0166I Inventory file expiration finished processing for node OSOGBO, filespace OSOGBO\SystemState, copygroup BACKUP and object type GROUP BASE with processing statistics: examined 43, deleted 43, retrying 0, and failed 0. (SESSION: 1506, PROCESS: 2)
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Hi Frank,
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ANR0166I Inventory file expiration finished processing for node OSOGBO, filespace OSOGBO\SystemState\NULL\System State\SystemState, copygroup BACKUP and object type GROUP BASE with processing statistics: examined 43, deleted 43, retrying 0, and failed 0. (SESSION: 1506, PROCESS: 2)
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^
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I have a sneaky suspicion that once I find out what the problem was, I will ask myself why I didn't see it before...

Try this
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http://java.sun.com/j2se/1.5.0/docs/api/java/util/Scan
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javadocs:
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Please check the pro C/C++ developers guide.

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Putting a null character in a String?

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