Overloading string functions

hi everyone
i have a doubt regarding overloading concept in strings .i need to know whether we can overload string functions in java.you can take any function available in the string class.
regards
kvikram

The whole class of String is final, so you won't be able to inherit from it - and therefore, not overload any methods.
String is one of these very special constructs in Java, which are not meant to be enhanced or costumized.

Similar Messages

Search and replace string function

Hello, I am using the "search and replace string" function and it does nt seem to work consistently for me. I am using it in a situation where I am taking an array of strings, converting this into a spreadsheet string then deleting all of the commas. Has anyone experienced the same behavior? I have searched through other posts and found other simular faults but none of the fixes worked for this. I can post the code it needed.
Thanks,
Andrew

I agree that commas are often not desirable, especially if your software should also work in countries where comma is used as a decimal seperator.
Where are the commas coming from? Does (1) each element of the original array have one (or more), do you (2) use comma as seperator if you convert it to a spreadhseet string?
For (1), you might just strip out the comma for each element right in the loop. For case (2) you would simply use a different separator to begin with, of course.
Btw: you are abusing a WHILE loop as a FOR loop, because you have a fixed number of iterations. Please replace it with a FOR loop. If you use a FOR loop, LabVIEW can manage memory much more efficiently, because it can allocate the entire output array before the loop starts. For While loops, the total number of iterations is not known to the compiler. (Of course a real program would also stop the loop if an error occurs. In this case you would need to stay woth the WHILE loop. )
Do you have a simple example how the raw array elements look like. How many commas are there?
LabVIEW Champion . Do more with less code and in less time .

Error in XSLT mapping while using string functions

Hi All,
While using tokenize() and substring-before() functions in XSLT mapping,we are getting an error.The error message is Unexpected symbol "" So while using string functions in XSLT mapping do we have to use any header functions.
Please through light on syntax etc.,of string functions in XSLT.
Thanx in advance,
Lokesh Dhulipudi
Edited by: LOKESH DHULIPUDI on Dec 27, 2007 7:32 AM

Hi,
Hope you have gone thru this help:
http://w3schools.com/xsl/default.asp
Rgds, Moorthy

Wrong use of "Scan From String" function in a while loop?

Hi,
I've got a "Scan From String" function inside a while loop. On the first iteration it converts correctly the number passed by the input string (for example 4) But on the second one it has only spaces (one or more \s) as input string.
I expected to obtain a zero as output (as it does always that it can not make any conversions, as I am supposed to) but indeed, i subtracts 1 from the previous number (according to the number indicated as example I would obtain a 3 as output)
What's wrong with this?
Does the function fails on this case?
The rest of the diagram o the VI is expected to manage a 0 on that situation, like others in which the conversion is not made.
Andres.

I have simplified the VI evading calls to other VIs and trying to reproduce the mistake.
The type of string I introduce to reproduce the mistake is:
clock 3 (30) clock (40)
Forgetting to introduce a number between the second "clock" and the following parenthesis, I would manage it programmatically with code that isn't included.
Then "Scan From String" is supposed to do not make a conversion. But it leaves a 2 as output (in this example)
I have realised, unbelievable but true, that it has matter with the number I substract to the output number (if it were 2, I would obtain 1 as output and so on)
Excluding that, I got the conversion made before as output, 3, on the second time that "Scan From String" executes. But, how can this func
tion as bad?
I am using LV4 on an old PC. I have tried to reproduce it with LV6 and it works. But it isn't desirable for me, I would have to convert a lot of VIs and surely I will find a lot of errors due to the conversion (I have already tried)
Attachments:
EXTCLOCK.VI ‏26 KB

Essbase MDX - string functions are not working!

Hi all!
this MDX code works fine (LEN function):
With
member Scenario.MS1 as 'Len([Account].currentmember.member_name)'
select { Scenario.MS1} on columns from http://Planing.Budget
this code raises error (UPPER or any string function):
With
member Scenario.MS1 as 'Upper([Account].currentmember.member_name)'
select { Scenario.MS1} on columns from http://Planing.Budget
The administration tool I am using is for version 11.1.1.3 ..
why? O_o
Edited by: serzzzh on 14.10.2009 22:54

Unless maybe if you're using J2ME and have very tight memory requirements (are you?) either an array or a Vector should be fine to hold 8000 strings.
So I'm guessing, either:
1) you're using J2ME, have a device with tight memory, in which case you probably need a redesign, either to move data off the device and into an online service or the like, or possibly to use the record db system that's in one of the J2ME profiles (although 8000 seems like a lot of stuff to put in such a small form factor device).
2) the strings are in fact enormous, in which case array-or-vector isn't the issue
3) there's some other problem. maybe you have a runaway recursive method or something.

Contains (String function) is not working in switch condition .

Hi All ,
I have a interface in which there are two projects.
1 notification interface
2 DFW interface .
Project 1 Has Mediator in it where I am checking a Filter condition on DESTINATION PARTNER ID as below
contains($in.request/inp1:TSOHoldCommon/inp1:Destination_Partner_ID,'DFW')
as you all know this is the string function(containd) I have used.
But there is a problem I am facing , when i use the same condition in DFW INTERFACE in all the switch conditions i have used .
So now the problem is in switch condition used in BPEL of DFW INTERFACE.
I have a asign statement after this condition,and i am getting assign pending so flow is faulting.
please help me in this regard or give me any suggestions for fixing this .
BPEL VERSION 1.1
SOA 11.1.1.6

Please post the error log which you are getting in EM.
Thanks,
Ashutosh

Split string function in oracle ...

Hello,
Little question, is there any split string function available in Oracle.
SQL> select more_info
2 from dba_advisor_findings;
MORE_INFO
Allocated Space:4390912: Used Space:4237403: Reclaimable Space :153509:
select more_info as Allocated_Space,
more_info as Used_Space,
more_info as Reclaimable_Space
from dba_advisor_findings
Allocated_Space Used_Space Reclaimable_Space
4390912 4237403 153509
Thanks,
Manish Gupta

I explored more on SUBSTR and INSTR string functions ... and below is the solution
select substr(more_info,instr(more_info,':',1,1)+1,instr(more_info,':',1,2)-instr(more_info,':',1,1)-1) as "Allocated_Space",
substr(more_info,instr(more_info,':',1,3)+1,instr(more_info,':',1,4)-instr(more_info,':',1,3)-1) as "Used_Space",
substr(more_info,instr(more_info,':',1,5)+1,instr(more_info,':',1,6)-instr(more_info,':',1,5)-1) as "Reclaimable_Space"
from dba_advisor_findings;
Allocated_Space
Used_Space
Reclaimable_Space
4390912
4237403
153509
Thanks...

[OT] User-Defined string Functions Oracle PL/SQL

Ladies and Gentlemen,
I am pleased to offer the following string functions Oracle PL/SQL:
GETALLWORDS(): Inserts the words from a string into the table.
GETWORDCOUNT(): Counts the words in a string.
GETWORDNUM(): Returns a specified word from a string.
OCCURS(): Returns the number of times a character expression occurs within another character expression (including overlaps).
OCCURS2(): Returns the number of times a character expression occurs within another character expression (excluding overlaps).
PADC(): Returns a string from an expression, padded with spaces or characters to a specified length on the both sides.
STRTRAN(): Searches a character expression for occurrences of a second character expression, and then replaces each occurrence with a third character expression. Unlike a built-in function Replace, STRTRAN has three additional parameters.
STRFILTER(): Removes all characters from a string except those specified.
RAT(): Returns the numeric position of the last (rightmost) occurrence of a character string within another character string (including overlaps). The search performed by RAT() is case-sensitive. RAT similar to the PL/SQL function INSTR.
ATC(): Returns the beginning numeric position of the first occurrence of a character expression within another character expression, counting from the leftmost character (including overlaps). The search performed by ATC() is case-insensitive. ATC similar to the PL/SQL function INSTR.
RATC(): Returns the numeric position of the last (rightmost) occurrence of a character string within another character string (including overlaps). The search performed by RATC() is case-insensitive. RATC similar to the PL/SQL function INSTR.
AT2(): Returns the beginning numeric position of the first occurrence of a character expression within another character expression, counting from the leftmost character (excluding overlaps). The search performed by AT2() is case-sensitive. AT2 similar to the PL/SQL function INSTR.
REPLICATE(): Returns a character string that contains a specified character expression repeated a specified number of times.
ROMANTOARAB(): Returns the number equivalent of a specified character Roman numeral expression (from I to MMMCMXCIX).
Plus, there are versions for MS SQL SERVER, SYBASE ASA, DB2, MS SQL SERVER 2005 SQLCLR.
More than 8000 people have already downloaded my functions. I hope you will find them useful as well.
For more information about string UDFs Oracle PL/SQL please visit the
http://www.universalthread.com/wconnect/wc.dll?LevelExtreme~2,54,33,29233
Please, download the file
http://www.universalthread.com/wconnect/wc.dll?LevelExtreme~2,2,29233
With the best regards.

>
I am using the Oracle Data Provider in vs2012. I am having trouble calling a function that returns an object type defined.
>
Returning a collection like that is a bad idea to begin with. That isn't scaleable and wastes memory.
Either return a REF CURSOR and let the client FETCH the rows or use a PIPELINED function and let the client query it like they would a table.
Here is an example similar to yours that uses a PIPELINED function.
create or replace
    package pkg2
      as
        CURSOR emp_cur is (SELECT empno, ename, job, mgr, deptno FROM emp);
        type pkg_emp_table_type is table of emp_cur%rowtype;
        function get_emp(
                         p_deptno number
          return pkg_emp_table_type
          pipelined;
end;
create or replace
    package body pkg2
      as
        function get_emp(
                         p_deptno number
          return pkg_emp_table_type
          pipelined
          is
          begin
              for v_emp_rec in (SELECT empno, ename, job, mgr, deptno
                                FROM emp where deptno = p_deptno) loop
                pipe row(v_emp_rec);
              end loop;
          end;
end;
select * from table(pkg2.get_emp(20));
       EMPNO ENAME      JOB              MGR     DEPTNO
        7369 DALLAS     CLERK2          7902         20
        7566 DALLAS     MANAGER         7839         20
        7788 DALLAS     ANALYST         7566         20
        7876 DALLAS     CLERK           7788         20
        7902 DALLAS     ANALYST         7566         20

Supplementary characters and string functions

I am using AL32UTF8 as my database character set and plan to store Japanese supplementary characters in the DB character set itself. Do I need to use any special string functions for these supplementary Japanese characters.

With the AL32UTF8 character set, supplementary characters like any other characters, except that they are the widest (4 bytes). You just need standard multibyte processing.
With AL16UTF16 (NCHAR), and depending on your needs, you may want to use certain SQL function variants that have 4 in their name: LENGTH4, INSTR4, SUBSTR4, LIKE4.
When retrieving AL32UTF8 supplementary characters through JDBC or OCI in UTF-16 mode, you have to take care of the fact that one AL32UTF8 supplementary character becomes 2 UTF-16 code units (a surrogate pair). This is important for buffer allocations, length calculations, and any code that can split strings into substrings.
-- Sergiusz

How to build a library of string functions?

I want to create a set of my own special string functions. Trouble is I cannot create a class that extends String because it has been declared final. I want to be able to use the existing String functions as well as my own. Any ideas?
Thanks in advance.

Create a class that doesn't extend String. Use the String methods. You don't have to extend a class to use its methods. Example:public class LameUtility {
public static char getFirstCharacter(String s) {
return s.charAt(0);
}

Whats happening internally within the unflatten from string function?

I am getting unflatten from string error intermitently in my program. I can't post the program to get help but essentially I am storing a GOOP object reference as a string. The reference is flattened to a string and stored upon creation, at a latter time the string is then unflatterned to retrieve the reference and then the data. This works most of the time but occansionaly the unflatterned from string function fails. Prior to passing the string to the function I am checking that the string isn't null. I am assuming something else is corrupting the string prior to passing to this fucntion and would like to know what would trigger the error in the function as it may help me realise what is happening
prior.
Cheers,
Wayne

Hi,
It really seems strange this problem, but one thing that might be the cause is how you store the flatten string. You do not mention that. I have once had problems when storing GOOP references as a sting and passing them between test VIs in TestStand using a string parameters in TestStand. A flatten string might have special chars that not all applications (such as TestStand parameters) can handle that and just trunkate the string when such a char is present, mistakenly inteprets that as end of string. Have you tried to check that string length is the same?
However to make sure you get rid of all problems with string termination, you really should cast your GOOP reference into something else. I would instead cast the reference to an U32, or
if you want, to solve the string problem for other types than GOOP reference, then flatten the type into string and then convert the string to an array of U8 before storing it. This would by sure solve your problem.
Regards,
Mattias Ericsson
Endevo
Sweden
Main developer of the new GOOP2 and GOOP Wizard 3.
PS! Have you seen that there is a new GOOP release that also may handle inheritance? Please check out: http://www.endevo.se/default.asp?lang=eng and click on "Products". There are examples, demos and white papers describing the new GOOP Inheritance Toolkit.
Attachments:
CastRefExample.vi ‏18 KB

String function to count total number of a specific character.

Gurus,
I've been trying to use INSTR to decipher a string to count the number of pipes in each string. Anyone have a simple SQL which shows how to use a string function to return a count of a specific character?
Thanks
-Scott

Hi, Scott,
To see how many '|' characters are in txt, you can see how much txt shrinks when you remove the '|'s.
LENGTH (txt) - NVL ( LENGTH ( TRANSLATE ( txt
                                                  , 'x|'
                         , 'x'
             , 0
             )The expression above works in any version of Oracle.
Starting in Oracle 11, you can also use REGEXP_COUNT:
REGEXP_COUNT (txt, '\|')'|' is a special symbol in regular expressions, so it has to be "escaped" ('\|') to indicate the pipe character.

Flatten To String Function

Why does Flatten To String Function always prepend array size when used with Cluster?
Is it normal?
LabVIEW 8.6 and LabVIEW 2009
Thanks,
Attachments:
example1.vi ‏11 KB

If by "normal" you mean documented then yes. I believe the same is true for arrays of strings. Outside of a cluster, you can infer the array size from the length of the string (in theory). Once you add the cluster, all bets are off so you need the length information to recover the data.

I've designed Calculator Program, used by String function

Hello Everyone,
I've designed Calculator Program, used by String function. U've any Feedback in this program, cantact me.
Thanks & Regards,
SABARI SARAVANAN M
Certified LabVIEW Associate Developer
Attachments:
calculator.vi ‏71 KB

Hi Jitendra,
Does the dump log shows that the cause is memory shortage?
Thanks and Best Regards,
Vikas Bittera.
**Points for useful answers**

How to get numeric result from 'search and replace' string function

hii
i am using search and replace function to get output.my output is of form ' *X0123.3 ' .here i am replacing the term *X01 with space because i need only 23.3 as a result.but i am unable to get that out in the output indicator.i used lot of functions like string to number and so on but i am getting output as zero .can you please suggest me wt to do.i am attaching a copy of my file.
Attachments:
Untitled 1.vi ‏25 KB

Your problem is the fact that you are converting it to an integer, thus loosing the fractional part. You need to use "Fract/Exp String To Number" instead and create a DBL so yor data is 23.3 instead of 23.
You also don't need to manipulate the string if the initial part is of constant lenght. Just use the offset input as in the figure below.
Message Edited by altenbach on 07-31-2006 07:02 AM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
ToDBL.png ‏2 KB

Overloading string functions

Similar Messages

Maybe you are looking for