Please help!! clickable String

Lets say that I have this string:
strCheckFailure = "You must visit http://www.somesitehere.com to complete your request.";
I would like to be able to change the color of http://www.somesitehere.com to blue and also attach a mouseListener event only to this particular substring.
Afterwards I want to be able to add that String to
JOptionPane
JOptionPane.showMessageDialog(null, strCheckFailure, "Application encountered an error", JOptionPane.ERROR_MESSAGE);
Does anyone know how to do that?
Your help is greatly appreciated.

Lets say that I have this string:
strCheckFailure = "You must visit
http://www.somesitehere.com to complete your
request.";
I would like to be able to change the color of
http://www.somesitehere.com to blue and also attach a
mouseListener event only to this particular
substring.
Afterwards I want to be able to add that String to
JOptionPane
JOptionPane.showMessageDialog(null, strCheckFailure,
"Application encountered an error",
JOptionPane.ERROR_MESSAGE);
Does anyone know how to do that?
Your help is greatly appreciated.

Similar Messages

Please Help urgent String Concepts

String str = new String("v");
String str = "v";
I would like to know what's the exact difference between these two. I know that the first one create a new object and assign it value "v". So second also create a Object and so the same,but if we create another variable (with out new) with same content "v" both will share the same reference. am I right on this.
Please comment in detail
Thanks in advance
Vivek Nidhi

its a good idea to search forums before you ask!
however, here is the answer.. see 3rd reply
http://forum.java.sun.com/thread.jsp?forum=31&thread=418658

Kinda urgent please help pass strings to doubles and strings to ints

Need to know how to pass strings to doubles and strings to ints
and to check if a string is null its just if (name == null;) which means black right?
like size as a string and then make the string size a double

cupofjava666 wrote:
Need to know how to pass strings to doubles and strings to ints
and to check if a string is null its just if (name == null;) which means black right?
like size as a string and then make the string size a doubleThink he means blank.
Check the Wrapper classes (Double, Integer) in the api.
parseInt() parseDouble() both take a string and return a primitive.
String s = null;
if(s == null) should do the trick!
Regards.
Edited by: Boeing-737 on May 29, 2008 11:08 AM

Troubled with PreparedStatement, please help

Hello all:
Here is a seemingly too simple a problem which is already taking my day. Please help.
String x=null;
String querry1 = null;
String querry2 = null;
ResultSet rs = null;
Statement st = null;
PreparedStatement pstmt = null;
try {
st = conn.createStatement();
//MAKE FIRST QUERRY
querry1 = "SELECT * FROM table1 WHERE (a= ? OR b = ?)";
pstmt = conn.prepareStatement(querry1);
pstmt.setString(1, userInput);
pstmt.setString(2, userInput);
rs = pstmt.executeQuery();
while(rs.next()){
//Process the result set.
//The value of x is one of the values in the result set.
//Hence get it.
x = rs.getString("C");
}//end while
//No problem up to here.
//For check, output the value of x
System.out.println(x); //correct non-null value is displayed
//MAKE SECOND QUERRY based on the value of 'x'
querry2 = "SELECT * FROM table2 WHERE C= ? ";
//Table 1 and table 2 have a common column C.
//I want to retrieve the value from table 2 for which C=x;
pstmt = conn.prepareStatement(querry2);
pstmt.setString(1, x);
rs = pstmt.executeQuery();
//The problem is that in this 2nd querry, SQL error is caught, with the message
"java.sql.SQLException: Illegal operation on empty result set"
//whereas it should have produced a valid value.
//When the querry is formed explicitly (as follows), there is no problem. Result set is OK.
//when the value of x is "mystring", then the follwoing 3 lines work
pstmt = conn.prepareStatement(querry2);
pstmt.setString(1, "mystring");
rs = pstmt.executeQuery();
Please teach me what the hell I'm not getting here.
Thank you.

I would have thought you'd get this exception:
"java.sql.SQLException: Illegal operation on empty result set"
because you're trying to call something like:
rs.getString("foo");on an empty ResultSet. You can test whether the ResultSet has any rows as ResultSet.next() returns a boolean value, i.e.:
if (rs.next())
rs.getString("foo");
}So the question is why is your second ResultSet empty? Maybe the value of C you are getting from table1 has leading/trailing whitespace that is not in table2?

Not able to convert string attribute to number and date please help me out

not able to convert string attribute to number and date attribute. While using string to date conversion it shows result as failure.As I am reading from a text file. please help me out

Hi,
You need to provide an example value that's failing and the date formats in the reference data you're using. It's more than likely you don't have the correct format in your ref data.
regards,
Nick

I need to pass a query in form of string to DBMS_XMLQUERY.GETXML package...the parameters to the query are date and varchar ..please help me..

I need to pass a query in form of string to DBMS_XMLQUERY.GETXML package...the parameters to the query are date and varchar ..please help me build the string .Below is the query and the out put. ( the string is building fine except the parameters are with out quotes)
here is the procedure
create or replace
procedure temp(
    P_MTR_ID VARCHAR2,
    P_FROM_DATE    IN DATE ,
    P_THROUGH_DATE IN DATE ) AS
    L_XML CLOB;
    l_query VARCHAR2(2000);
BEGIN
l_query:= 'SELECT
    a.s_datetime DATETIME,
    a.downdate Ending_date,
    a.downtime Ending_time,
    TO_CHAR(ROUND(a.downusage,3),''9999999.000'') kWh_Usage,
    TO_CHAR(ROUND(a.downcost,2),''$9,999,999.00'') kWh_cost,
    TO_CHAR(ROUND(B.DOWNUSAGE,3),''9999999.000'') KVARH
FROM
    (SELECT s_datetime + .000011574 s_datetime,
      TO_CHAR(S_DATETIME ,''mm/dd/yyyy'') DOWNDATE,
      DECODE(TO_CHAR(s_datetime+.000011574 ,''hh24:'
      ||'mi''), ''00:'
      ||'00'',''24:'
      ||'00'', TO_CHAR(s_datetime+.000011574,''hh24:'
      ||'mi'')) downtime,
      s_usage downusage,
      s_cost downcost
    FROM summary_qtrhour
    WHERE s_mtrid = '
    ||P_MTR_ID||
   ' AND s_mtrch   = ''1''
    AND s_datetime BETWEEN TO_DATE('
    ||P_FROM_DATE||
    ',''DD-MON-YY'') AND (TO_DATE('
    ||P_THROUGH_DATE||
    ',''DD-MON-YY'') + 1)
    ) a,
    (SELECT s_datetime + .000011574 s_datetime,
      s_usage downusage
    FROM summary_qtrhour
    WHERE s_mtrid = '
    ||P_MTR_ID||
    ' AND s_mtrch   = ''2''
    AND s_datetime BETWEEN TO_DATE('
    ||P_FROM_DATE||
    ',''DD-MON-YY'') AND (TO_DATE('
    ||P_THROUGH_DATE||
    ','' DD-MON-YY'') + 1)
    ) B
where a.S_DATETIME = B.S_DATETIME(+)';
SELECT DBMS_XMLQUERY.GETXML('L_QUERY') INTO L_XML   FROM DUAL;
INSERT INTO NK VALUES (L_XML);
DBMS_OUTPUT.PUT_LINE('L_QUERY IS :'||L_QUERY);
END;
OUTPUT parameters are in bold (the issue is they are coming without single quotes otherwise th equery is fine
L_QUERY IS :SELECT
    a.s_datetime DATETIME,
    a.downdate Ending_date,
    a.downtime Ending_time,
    TO_CHAR(ROUND(a.downusage,3),'9999999.000') kWh_Usage,
    TO_CHAR(ROUND(a.downcost,2),'$9,999,999.00') kWh_cost,
    TO_CHAR(ROUND(B.DOWNUSAGE,3),'9999999.000') KVARH
FROM
    (SELECT s_datetime + .000011574 s_datetime,
      TO_CHAR(S_DATETIME ,'mm/dd/yyyy') DOWNDATE,
      DECODE(TO_CHAR(s_datetime+.000011574 ,'hh24:mi'), '00:00','24:00', TO_CHAR(s_datetime+.000011574,'hh24:mi')) downtime,
      s_usage downusage,
      s_cost downcost
    FROM summary_qtrhour
    WHERE s_mtrid = N3165 AND s_mtrch   = '1'
    AND s_datetime BETWEEN TO_DATE(01-JAN-13,'DD-MON-YY') AND (TO_DATE(31-JAN-13,'DD-MON-YY') + 1)
    ) a,
    (SELECT s_datetime + .000011574 s_datetime,
      s_usage downusage
    FROM summary_qtrhour
    WHERE s_mtrid = N3165 AND s_mtrch   = '2'
    AND s_datetime BETWEEN TO_DATE(01-JAN-13,'DD-MON-YY') AND (TO_DATE(31-JAN-13,' DD-MON-YY') + 1)
    ) B
where a.S_DATETIME = B.S_DATETIME(+)

The correct way to handle this is to use bind variables.
And use DBMS_XMLGEN instead of DBMS_XMLQUERY :
create or replace procedure temp (
p_mtr_id       in varchar2
, p_from_date    in date
, p_through_date in date
is
l_xml   CLOB;
l_query VARCHAR2(2000);
l_ctx   dbms_xmlgen.ctxHandle;
begin
l_query:= 'SELECT
    a.s_datetime DATETIME,
    a.downdate Ending_date,
    a.downtime Ending_time,
    TO_CHAR(ROUND(a.downusage,3),''9999999.000'') kWh_Usage,
    TO_CHAR(ROUND(a.downcost,2),''$9,999,999.00'') kWh_cost,
    TO_CHAR(ROUND(B.DOWNUSAGE,3),''9999999.000'') KVARH
FROM
    (SELECT s_datetime + .000011574 s_datetime,
      TO_CHAR(S_DATETIME ,''mm/dd/yyyy'') DOWNDATE,
      DECODE(TO_CHAR(s_datetime+.000011574 ,''hh24:'
      ||'mi''), ''00:'
      ||'00'',''24:'
      ||'00'', TO_CHAR(s_datetime+.000011574,''hh24:'
      ||'mi'')) downtime,
      s_usage downusage,
      s_cost downcost
    FROM summary_qtrhour
    WHERE s_mtrid = :P_MTR_ID
    AND s_mtrch   = ''1''
    AND s_datetime BETWEEN TO_DATE(:P_FROM_DATE,''DD-MON-YY'')
                       AND (TO_DATE(:P_THROUGH_DATE,''DD-MON-YY'') + 1)
    ) a,
    (SELECT s_datetime + .000011574 s_datetime,
      s_usage downusage
    FROM summary_qtrhour
    WHERE s_mtrid = :P_MTR_ID
    AND s_mtrch   = ''2''
    AND s_datetime BETWEEN TO_DATE(:P_FROM_DATE,''DD-MON-YY'')
                       AND (TO_DATE(:P_THROUGH_DATE,'' DD-MON-YY'') + 1)
    ) B
where a.S_DATETIME = B.S_DATETIME(+)';
l_ctx := dbms_xmlgen.newContext(l_query);
dbms_xmlgen.setBindValue(l_ctx, 'P_MTR_ID', p_mtr_id);
dbms_xmlgen.setBindValue(l_ctx, 'P_FROM_DATE', to_char(p_from_date, 'DD-MON-YY'));
dbms_xmlgen.setBindValue(l_ctx, 'P_THROUGH_DATE', to_char(p_through_date, 'DD-MON-YY'));
l_xml := dbms_xmlgen.getXML(l_ctx);
dbms_xmlgen.closeContext(l_ctx);
insert into nk values (l_xml);
end;

Problem in comparision of two strings.please help..

I am retriving a string password from database and another string from html(user entered one).when i am printing those two strings its printing same strings.But whenever i am comparing strings and printing its not showing equal it is printing as false.what might be the reason.please help me regarding this.Thank you in advance.My cosing is as follows:
while(rs.next())
pwd=rs.getString("password");
System.out.println("pmfg is..."+pwd);
System.out.println("first string..."+pwd);
System.out.println("second string..."+loginpwd);
if(pwd.equals(loginpwd))
System.out.println("true.....");
else
System.out.println("false....");

once you got two string objects ......forget for where they are comming (database or html0 ....focus on those objects ....do the following
1) use trim() function on both strings which removes the whitespaces from front and end
2) use equalsIgnoreCase
if the problem still persists ....then forget your code and sue the SUN people

String problem please help

please help...
String aa, bb, cc,dd;
aa="123456789";
bb="23";
cc="78";
actually i want to cut off some special words in a String
i use
int ak3=aa.indexOf(bb);
int ak4=aa.lastIndexOf(bb);
dd=aa.substring(ak3,ak4);
i want the result of dd is 14569
is there any problem
please help

Here is a better version of the code I posted earlier. This version ensures that bb and cc are contained within aa.
The following case will still cause a problem...
aa = "123456789";
bb = "34";
cc = "45";
cc will not be found because the removal of bb took out the 4 needed to complete cc.
public class MySubString
    public MySubString()
    public static void main (String [] args)
        String aa = new String ("123456789");
        String bb = new String ("88");
        String cc = new String ("23");
        String dd = aa;
        if (aa.indexOf(bb) >= 0)    // check to see that bb is contained within aa
            // use parts of aa from beginning of aa to beginning of bb as well as
            // end of bb to end of aa
            dd = aa.substring(0, aa.indexOf(bb)) + aa.substring(aa.indexOf(bb)+bb.length());
        if (dd.indexOf(cc) >= 0)    // check to see that cc is contained within dd
            // use parts of dd from beginning of dd to beginning of cc as well as
            // end of cc to end of dd
            // use dd in this section, because cc may appear before or after bb in aa
            dd = dd.substring(0, dd.indexOf(cc)) + dd.substring(dd.indexOf(cc)+cc.length());
        System.out.println(dd);
}

Sort a string :: Please help.

Hello Everyone,
I am having this very simple problem of sorting a String. please help.
     static String sortString(String str){
          List list = Arrays.asList(str);
          Collections.sort(list);
          for(int i=0, n=list.size();i<n;i++){
               System.out.println(","+ list.get(i));
The function is supposed to take a String and sort it & print it out. This should be simple. Where am I making mistakes? Please help!!

Hello Everyone,
I am having this very simple problem of sorting a String. please help.
     static String sortString(String str){
          List list = Arrays.asList(str);
          Collections.sort(list);
          for(int i=0, n=list.size();i<n;i++){
               System.out.println(","+ list.get(i));
               return str;
The function is supposed to take a String and sort it & print it out. This should be simple. Where am I making mistakes? Please help!!

Pass username and password ADFS without using query string, Please help.

pass username and password ADFS without using query string, Please help.
I used query string , but it is unsecured to pass credentials over url, with simple tool like httpwatch , anyone can easily get the password and decrypt it.

Hi,
According to your post, my understanding is that you had an issue about the ADFS.
As this issue is related to ADFS, I recommend you post your issue to the forum for ADFS.
http://social.msdn.microsoft.com/Forums/vstudio/en-US/home?forum=Geneva
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us.
Thank you for your understanding and support.
Thanks,
Jason
Forum Support
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact
[email protected]
Jason Guo
TechNet Community Support

Adding "\b" to a string. Please help!

I can't get to add "\b" (backspace) to a string.
When I try to print the string, "\b" shows up as a square.
It's a java applet, and import is "import java.applet.*;"
Please help fast, I appreciate greatly!

I can't get to add "\b" (backspace) to a string.Why would you want to? Why not just delete the last character?
When I try to print the string, "\b" shows up as a square.Print it on what? Clearly on something that doesn't understand backspace.
It all seems pointless to me.
It's a java applet, and import is "import java.applet.*;"Entirely irrelevant except that it tells us this is a GUI, and GUIs don't understand backspaces, and you don't 'print' to a GUI, you display, and why you aren't just deleting the final character remains a mystery.
Please help fastThe speed of the responses here depends on other people's time allocations, not yours.

Please help me with my code (has conversion from string to int)

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class Test3 extends MIDlet implements CommandListener
{   Form mForm;
    Command mCommandQuit;
    Command mCommandItem;
    TextField input,prime1,prime2,prime3,output;
    Display mDisplay;
    int i,j=0,k1,k2,p,q,b;
    //int [] current=new int [1000];
    String mstring,a="";
    String [] temp=new String [1000];
    public void startApp()
    {System.out.println("startApp");
     mForm=new Form("RSA Encryption");
     mCommandQuit=new Command("QUIT",Command.EXIT,0);
     mCommandItem=new Command("ENCRYPT",Command.ITEM,0);
     mForm.append("Enter text:\n");
     input=new TextField(null,"",100, TextField.ANY);
     mForm.append(input);
     mForm.append("Enter first prime number(p):\n");
     prime1=new TextField(null,"",100, TextField.ANY);
     mForm.append(prime1);
     mForm.append("Enter second prime number(q):\n");
     prime2=new TextField(null,"",100, TextField.ANY);
     mForm.append(prime2);
     mForm.append("Enter d:\n");
     prime3=new TextField(null,"",100, TextField.ANY);
     mForm.append(prime3);
     mForm.addCommand(mCommandQuit);
     mForm.addCommand(mCommandItem);
     mDisplay=Display.getDisplay(this);
     mDisplay.setCurrent(mForm);
     mForm.setCommandListener(this);
    public void pauseApp()
    {System.out.println("pauseApp");
    public void destroyApp(boolean unconditional)
    {System.out.println("destroyApp");
    public void commandAction(Command c, Displayable d)
    {System.out.println("commandAction");
     if(c==mCommandQuit)
        notifyDestroyed();
     else if(c==mCommandItem)
     {p = Integer.parseInt(prime1.getString());
         q = Integer.parseInt(prime2.getString());
         b = Integer.parseInt(prime3.getString());
         //breaking up of big string into ints
         mstring=input.getString();
         temp[0]="";
         for(i=1;i<mstring.length();i++)
            {if (mstring.charAt(i) == ' ')
                {j++;
                 temp[j]="";
             else
                {temp[j]=temp[j]+mstring.charAt(i);
         mForm.append("\n\nThe array is:\n");
         for(i=0;i<temp.length && temp!=null;i++)
{k1=Integer.parseInt(temp[i]); ***********************
k2=k1;
for(j=1;j<b;j++)
{k1=k1*k2;
k1=k1 %(p*q);
k2=k1 %(p*q);
a=a+new Character((char)k2).toString();
output=new TextField(null,a,100, TextField.ANY);
mForm.append(output);
}hi
this code basically takes an input of string like " 179 84 48 48 155 " (with spaces)
then it creates smaller strings in an array like "179","84","48","48","155" without the spaces
then it creates int values 179,84,48,48,155 and finally after some math functions it prints the corresponding letters.
the problem is that it is not printing the letter because of some exceptions-->java.lang.NumberFormatException .it comes in the line where i have put stars
could anybody please help me print the letters

thanks for all ur help guys, but me and my team member solved it on our own. here is the new code:
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class Test3 extends MIDlet implements CommandListener
{   Form mForm;
    Command mCommandQuit;
    Command mCommandItem;
    TextField input,prime1,prime2,prime3,output;
    Display mDisplay;
    int i,j=0,l,k1,k2,p,q,n,b;
    String mstring,a = "";
    String [] temp=new String [1000];
    public void startApp()
    {System.out.println("startApp");
     mForm=new Form("RSA Encryption");
     mCommandQuit=new Command("QUIT",Command.EXIT,0);
     mCommandItem=new Command("DECRYPT",Command.ITEM,0);
     mForm.append("Enter text:\n");
     input=new TextField(null,"",100, TextField.ANY);
     mForm.append(input);
     mForm.append("Enter first prime number(p):\n");
     prime1=new TextField(null,"",100, TextField.NUMERIC);
     mForm.append(prime1);
     mForm.append("Enter second prime number(q):\n");
     prime2=new TextField(null,"",100, TextField.NUMERIC);
     mForm.append(prime2);
     mForm.append("Enter d:\n");
     prime3=new TextField(null,"",100, TextField.NUMERIC);
     mForm.append(prime3);
     mForm.addCommand(mCommandQuit);
     mForm.addCommand(mCommandItem);
     mDisplay=Display.getDisplay(this);
     mDisplay.setCurrent(mForm);
     mForm.setCommandListener(this);
    public void pauseApp()
    {System.out.println("pauseApp");
    public void destroyApp(boolean unconditional)
    {System.out.println("destroyApp");
    public void commandAction(Command c, Displayable d)
    {System.out.println("commandAction");
     if(c==mCommandQuit)
        notifyDestroyed();
     else if(c==mCommandItem)
     {p = Integer.parseInt(prime1.getString());
         q = Integer.parseInt(prime2.getString());
         b = Integer.parseInt(prime3.getString());
         n=p*q;
         //breaking up of big string into ints
         mstring=input.getString();
         temp[0]="";
         for(i=1;i<mstring.length();i++)
            {if (mstring.charAt(i) == ' ')
                {j++;
                 temp[j]="";
             else
                {temp[j]=temp[j]+mstring.charAt(i);
         l=j;
         mForm.append("\n\nThe result is:\n");
         for(i=0;i<l;i++)
            {k1=Integer.valueOf(temp).intValue();
k2=k1;
for(j=1;j<b;j++)
{k2=k2*k1;
k2=k2 %n;
k1=k2 %n;
a=a+new Character((char)k1).toString();
output=new TextField(null,a,100, TextField.ANY);
mForm.append(output);

Problem in String.replaceAll please help

String ash = "XXX";
String ch = ash.replaceAll("X","$");
while executing the above code i am getting an exception
java.lang.StringIndexOutOfBoundsException: String index out of range: 1
     at java.lang.String.charAt(Unknown Source)
     at java.util.regex.Matcher.appendReplacement(Unknown Source)
     at java.util.regex.Matcher.replaceAll(Unknown Source)
     at java.lang.String.replaceAll(Unknown Source)
please help me
baiju

Cross-post
http://forum.java.sun.com/thread.jspa?threadID=607145

I have proubleam with string to date conversion, i out put date fromat is 2012-04-30T23:48:55.727-07:00 . so please help me the format conversion

i have proubleam with string to date conversion, i out put date fromat is 2012-04-30T23:48:55.727-07:00 . so please help me the format conversion.
i wrote the method but it not workig
My method is
-(NSDate *)dateformstr:(NSString *)str
NSString *date = [str stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSDateFormatter *dateFormate = [[NSDateFormatter alloc] init];
[dateFormate setDateFormat:@"yyyy-MM-dd'T'HH:mm:sssZZZZ"]
// NSDate *formatterDate = [dateFormate dateFromString:str];
return formatterDate;
but i did not the value and if i try othere formate i is working but my requiremet format is 2012-04-30T23:48:55.727-07:00.
can any help it out in this senario.

Sorry Butterbean, but I'm interested in the answer to your question myself.
I've spent a few hours transfering my library from one computer to another and then find out that my ratings didn't transfer. Like you, I've spent many hours rating my 2000+ songs. I'm sure you have more, nevertheless, I want to find out how to get those ratings. They still show in my iTunes on my laptop but, when I go to the iTunes folder and display the details of at song, no rating is there. If you find out how to get them to display there in the iTunes folder, it seems that would be the key.
Hope you get your answer soon.

Please, help .. return not working. string can not be resolved to a variabl

Greetings..
I am writing a Java code that encrypt a String using DES. After encryption, I want to return the String, but I get error that says: variable can not be resolved. Please, help me to find out what is the problem ?? Thanks in advance.
Here is the code:
import javax.crypto.*;
import java.security.*;
public class Client {
     public String DESEncrypt(String cardnum)
          try{
          //create cipher object for DES
          Cipher c=Cipher.getInstance("DES");
          // craete the symmetric key for DES
          KeyGenerator kg=KeyGenerator.getInstance("DES");
          Key key=kg.generateKey();
          // DO the ecryption steps then display the result
          c.init(Cipher.ENCRYPT_MODE, key);
          //Dofinal accepts byts only. Thats why we use getbytes method.
          byte[] cardNoBytes=cardnum.getBytes("UTF8");
          //get the encrypted bytes
          byte[] encryptedCardNoBytes=c.doFinal(cardNoBytes);
          //convert bytes to string
          String cardNoString=new String(encryptedCardNoBytes);
          } catch(Exception e){ System.out.print("Error");
          return cardNoString;
     } //end the DESEncrypt method
public static void main (String[] args) {
try{
     Client cl=new Client();
     String x2=cl.DESEncrypt("123");
     System.out.println("The Encrypted text using DES is: " + x2+'\n');
} catch(Exception e){ System.out.print("Error");
}//end main
}

Next time, paste in the exact, complete error message and indicate clearly exactly which line is causing it.
Your problem is that you declare cardNoString inside the try block, but you try to return it outside. Local variables only exist in the narrowest block in which they're declared. Once you exit try, that variable does not exist.
You also have a logical problem. If an error occurs, you're just printing out :"Error", but you're not actually handling it. You're going on as if everything is fine. Catching an exception doesn't fix the error. If you can't fix it, don't catch it.
What do you think your method will return if an exception occurs before you set cardNoString? What do you think it will do to the caller to have some arbitrary, meaningless value returned when he thinks everything went fine and he got a valid result?

Please help, urgently Error 1 occurred at Scan From String (arg 1).

I am communicating with the AT Trainer 5000 via serial port to USB converter.
I installed all drivers of converter successfully and it is shown in MAX as com port. I also installed VISA software.
I am using labview 2013 version.
When I connect the hardware to PC via usb to serial converter, try to run the program for seeing of real time graphs, I am receiving this error Error 1 occurred at Scan From String (arg 1) whereas there is no waveform shown in waveform chart.
Also read buffer didn't show an incoming data at read buffer.
Other details for this error is
Possible reason(s):
LabVIEW: An input parameter is invalid. For example if the input is a path, the path might contain a character not allowed by the OS such as ? or @.
Also pics of error is:
Program is also attached. Please checked the also.
Expert please help me how to get rid of this error.
Attachments:
Project.vi ‏23 KB

duplicate post http://forums.ni.com/t5/Instrument-Control-GPIB-Serial/Error-1-occurred-at-Scan-From-String-arg-1/td...

Please help!! clickable String

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