Convert byte to string - not working

Hello. I'm having trouble figuring out this conversion. I want to check if a byte from a byte array is equal to a specified string (or character). This is the code that I have:
byte byteArray[] = new byte[3];
byte tempByte = byteArray[2];
String tempString = tempByte.toString();
The compilation error that I'm getting: byte cannot be dereferenced
If you have any idea what I should do to fix this, please let me know.
c00p

Use this line instead:
String tempString = Byte.toString(tempByte);
You can't call a method on a primitive type of byte.

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How to convert byte into string

can any tell me how to convert byte into string
when im an debugging thid code in eclipse it shows the result in integer format instead of string but in command prompt it is showing result in string format..........plz help
package str;
import java.io.*;
public class Testfile {
public static void main(String rags[])
byte b[]=new byte[100];
try{
FileInputStream file=new FileInputStream("abc.txt");
file.read(b,0,50);
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System.out.println("Exception is:"+e);
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Namrata.Kakkar wrote:
errors: count cannot be resolved and Unhandled exception type Unsupported Encoding Exception.
If i write an integer value instead of "count" then Unhandled exception type Unsupported Encoding Exception error is left.This is elementary. You need to go back to [http://java.sun.com/docs/books/tutorial/|http://java.sun.com/docs/books/tutorial/] .

Number to fractional string not working correctly

I am measuring some parameters from oscillsocpe. i need to write these values to text file for which i am using write to spreadsheet, but what is happening is it is always writing zero value to file, on debugging i found that while converting from number to string it is always writng zero to string indicator, then separately i used that number to fractional string indicator and it is always showing zero in string output , i dont why it is happening.
Attached below is the code.
Solved!
Go to Solution.
Attachments:
Time meas sub.vi ‏31 KB

Ranjeet Singh and Norbert_B
Thanks for ther reply
Ranjeet singh,
number to fractional string is working correctly, there is some other problem, because inly when i am executing this code converting this rise time value to string then only it is showing zero, otherwise for any random number if i am checking this number to fractional string is working correctly.
Norbert_B
i dont need to convert it back to string that i am doing only to check why it is showing zero value on converting number to string , because when i was writing to spreadsheet file it was always writing zero value, so when checked that code it was observed that while converting from array of numbers to spreadsheet string it is always writing zero value that's why i am doing it here just to check why it is not converting to string, but your suggestion helped in focussing the string that i am gettong from VISA read, i can use that in last case if i wont be able to find the solution but main problem is that why i am not able to convert it back to string, why it is showing zero because it is because of this only write to spreadsheet is always showing zero value .

I bought Smart Photo Converter which do,s not work but i can't get any refund , i have contacted the company but no reply and that was two weeks ago...so do you talk to someone at the App store?

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NXT Flatten to String Not Working with Clusters and Arrays

Hello,
My name is Joshua and I am from the FIRST Tech Challenge Team 4318, Green Machine. We are trying to write a program that will write to a configuration file and read it back. The idea is that we will be able to write to a config file from our computer that will be read by our autonomous program when it runs. This will define what the autonomous program does.
The easiest way to do this seems to be flattening a data structure to a string, saving it to a file, and then reading back and unflattening it. The issue is that the flatten to string and unflatten from string VIs don't seem to work with arrays and clusters on the NXT. It does work when running on the computer. We've tried arrays, clusters, clusters in arrays and arrays in clusters, none seem to work. Thinking it was something to do with reading the string from a file, we tried bypassing the file functionality, still not working. It does work with basic data types though, such as strings and numbers.
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I would like to know if there is a problem with what we are doing, or if it is simply not possible to flatten arrays on the NXT. Please ask if you have any questions about the code. Thank you in advanced!
Joshua
Attachments:
ReadableTest.vi ‏20 KB

Hi jfireball,
This is a very interesting situation. Take a look at what kbbersch said. I also urge you to post in the FTC Forums. You posted your question to the general LabVIEW forums, but by posting to the FTC Forums, you will have access to others that are using the NXT hardware.
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Applications Engineer
National Instruments

EBS Search String not working

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Kapil

Hi Kapil .
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16,699,12100,V,140710,,0000001159,1159/
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I use
byte[] encryptedBytes = cipher.doFinal(bytesToEncrypt);
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and sometimes i get the correct answer ans sometimes no. If yo want the code is in this post:
http://forum.java.sun.com/thread.jspa?threadID=790137&start=15&tstart=0

That's because the C language lacks true character and string data types. It only has arrays of bytes. Unfortunately in C bytes are misleadingly called "chars."
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How do I convert byte[] to String?

I've got a class that pulls information from a GPS receiver on a COM port. That works fine, but the information I'm getting from the port is in the following format:
Reading serial port...
44,44,52,46,50,44,77,44,45,51,52,46,50,44,77,44,44,48,48,48,48,42,120,30,-104,-128,96,120,96,0,-26,126,-98,-104,-98,0,30,-122,6,30,-122,6,120,-122,-32,-122,-32,-122,-32,-122,-32,-122,-32,-122,-32,-122,-32,-122,-32,-122,-32,-122,-32,120,-122,-32,-122,-32,-122,-32,-122,-104,-122,6,120,6,-98,30,-104,-128,96,120,96,0,-26,24,-26,-26,-104,30,30,-122,24,120,-32,120,30,102,120,-26,120,-26,-4,48,50,52,44,86,44,52,48,53,54,46,49,50,50,49,44,78,44,48,55,51,53,52,38,54,70,70,-58,118,-115,25,25,89,70,6,102,6,-122,-58,-58,-58,-26,83,102,-122,
-61,-31,
36,71,80,71,71,65,44,50,49,52,53,53,54,46,48,50,52,44,52,48,53,54,46,49,50,50,49,44,78,44,48,55,51,53,52,46,50,51,52,52,44,87,44,48,44,48,48,44,44,52,46,50,44,77,44,45,51,52,46,50,44,77,44,44,48,48,48,48,42,52,66,13,10,36,71,80,71,83,
65,So it's pretty obvious that it's spitting out ASCII values, so I changed the code a bit to print out the corresponding letters instead:
Reading serial port...
$GPGGA,214724.031,4056.1221,N,07354.2344,W,0,00,,4.2,M,-34.2,M,,0000*48
$GPGSA,A,1,,,,,,,,,,,,,,,*1E
$GPGSV,3,1,11,31,70,286,,14,57,089,,32,51,293,,30,44,061,*7D
$GPGSV,3,2,11,05,24,046,,22,23,167,,20,20,315,,16,15,194,*70
$GPGSV,3,3,11,12,12,039,,29,09,103,,11,00,279,*4F
$GPRMC,214724.031,V,4056.1221,N,07354.2344,W,,,140608,,,N*68
$GPGGA,214725.031,4056.1221,N,07354.2344,W,0,00,,4.2,M,-34.2,M,,0000*49
$GPGSA,A,1,,,,,,,,,,,,,,,*1ENow those are the NMEA sentences that the GPS receiver spits out, that's exactly what I need. Only problem is I'm printing them out using the following code:
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        if (bytesRead == -1)
          break;
        for (int z = 0; z < bytesRead; z++)
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        }So as you can see, it's simply taking the byte, converting it from ASCII to a symbol or letter, and putting it on the screen. Then it moves onto the next byte. So what I've tried to do is change it again so that it adds each converted letter to a string value, starting a completely new string every time it hits a $ sign, which always starts a NMEA sentence:
      byte[] buffer = new byte[4096];
      InputStream theInput = thePort.getInputStream();
      System.out.println("Reading serial port...");
      while (canRead()) // Loop
        int bytesRead = theInput.read(buffer);
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        for (int z = 0; z < bytesRead; z++)
             if (Character.toString((char)buffer[z]).equalsIgnoreCase("$") && s.length() > 1)
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//             System.out.print(Character.toString((char)buffer[z]));
s = "";
}The problem with this is for some reason the sentences aren't whole, there's line breaks inserted into them. So when I'm passing them to the parser, I'm passing incomplete sentences. Here's the output I'm getting now:
Reading serial port...
$GPGSA,A,1,,,,,,,,,,,,,,,*1E
.2,M,-34.2,M,,0000*4D
$GPGSA,A,1,,,,,,,,,,,,,,,*1E
,32,51,293,,30,44,061,*7D
$GPGSV,3,3,11,12,12,039,,29,09,103,,11,00,279,*4FHow do I get each NMEA sentence into a string so I can send it to a parser? Any ideas?
Edited by: DeX on Jun 14, 2008 6:02 PM

Your problem is that you're assuming a newline actually indicates the end of a line.
Assuming you can't fix the sender (or yell at the maintainer and get him to fix it), take
advantage of the fact that you know what a valid line starts with and just ignore the newline
characters.
Thanks but that gives me the same result. I think my issue is with the multithreading,
another thread is rolling through and assigning values to the String before the previous
thread is finished copying the bytes to it. I suggest you take advantage of the StringBuilder class. Also, if you insist on using the
String(byte[ ]) constructor, you should note that you're assuming a charset, a rather
dangerous thing to do. Use the String(byte[ ], String) constructor instead and explicitly use US-ASCII.

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Hi,
I have got a problem about my project, here it is....
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