Reg: String splitting
Hi,
I have a string like title-name.
i want to capture only title into another string.
how can i do it. kindly suggest.
Hi Prasanthi
You can either of the following code, for spliting and capturing the string.
1.
StringTokenizer st = new StringTokenizer("this is a test");
while (st.hasMoreTokens()) {
wdComponentAPI.getMessageManager().reportSuccess(st.nextToken());
2.
class StringSplit {
public static void main(String args[]) throws Exception{
new StringSplit().doit();
public void doit() {
String s3 = "Real-How-To";
String [] temp = null;
temp = s3.split("-");
dump(temp);
public void dump(String []s) {
wdComponentAPI.getMessageManager().reportSuccess("----
for (int i = 0 ; i < s.length ; i++) {
wdComponentAPI.getMessageManager().reportSuccess(s<i>);
wdComponentAPI.getMessageManager().reportSuccess("----
Thanks
Anup
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RobTelling someone to google might be deserved, but it is mean and unhelpful.
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If you are asking "does String.split() make use of multiple CPUs" then the answer is very probably not.
Making use of multiple CPUs seem to be the only likely reason to make a "mult-threaded" version.
If you are asking "is String.split() thread safe" then the answer is most probably yes.
Strings are immutable so cannot be 'damaged' by multiple threads.
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Problems with String.split(regex)
Hi! I'm reading from a text file. I do it like this: i read lines in a loop, then I split each line into words, and in a for loop I process ale words. Heres the code:
BufferedReader reader = new BufferedReader(new FileReader(file));
String line;
while ((line = reader.readLine()) != null) {
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reader.close();The problem is that if it reads an empty line, such as where is only an "\n", the tokens table has the length == 1, and it processes a string == "". I think the problem is that my regex delimiters is wrong:
String delimiters = "\\p{Space}|\\p{Punct}";
Could anybody tell me what to do?Ok, so what do you suggest?I suggest you don't worry about it.
Or if you are worried then you need to test the two different solutions and do some timings yourself.
And how do you know the regex lib is so slow and badly written?First of all slowness is all relative. If something takes 1 millisecond vs 4 milliseconds is the user going to notice? Of course not which is why you are wasting your time trying to optimize an equals() method.
A general rule is that any code that is written to be extremely flexible will also be slower than any code that is written for a specific function. Regex are used for complex pattern matching. StringTokenizer was written specifically to split a string based on given delimiters. I must admit I haven't tested both in your exact scenario, but I have tested it in other simple scenarios which is where I got my number.
By the way I was able to write my own "SimpleTokenizer" which was about 30% faster than the StringTokenizer because I was able to make some assumptions. For example I only allowed a single delimiter to be specified vs multiple delimiter handled by the StringTokenizer. Therefore my code could be very specific and efficient. Now think about the code for a complex Regex and how general it must be. -
Arraylist and string split help
i want to add items from a textfile into an array list here is the txt file
Title,Artist
tester,test
rest,test
red, blue
here is the code i am using
try{
FileReader fr = new FileReader(fileName);
BufferedReader br = new BufferedReader(fr);
String s;
int c = 0;
while((s = br.readLine()) != null) {
c=c+1;
CD c3 = new CD("");
String tokens[] = s.split(",");
for(String token : tokens) {
System.out.println(c);
System.out.println(tokens.toString());
if ( c == 2){
c3.setTitle(token);
System.out.println(c);
System.out.println(token);
c = c+1;
if ( c == 3 ){
c3.setArtist(token);
discsArray.add(c3);
System.out.println(token);
c = 1;
System.out.println(token); }}
fr.close();
}catch (Exception e){
System.out.println("exception occurrred");
}here is the output of the array
title: tester artist: tester title: rest artist: tester title: red artist: red
as you can see it misses the last line of the textfile and also doesnt display all of the separated string;
thanks any help is appreciatedthanks for ur help but that wasnt the problem
i have fixed it however when its read all the lines
an exception is always thrown
everything works just crashes at the end
any ideas
try{
FileReader fr = new FileReader(fileName);
BufferedReader br = new BufferedReader(fr);
String s;
int c = 0;
while((s = br.readLine()) != null) {
c=c+1;
CD c3 = new CD("");
String tokens[] = s.split(",");
for(String token : tokens) {
if ( c == 2){
c3.setTitle(token);
c = c+1;
if ( c == 3 ){
c3.setArtist(token);
if ( c == 3 ){
discsArray.add(c3);
c = 1;
fr.close();
br.close();
}catch (Exception e){
System.out.println("exception occurrred");
} -
What's rong wiht String.split(".")?
Hi all
I have two similar code below:
public class Test {
public static void main(String[] args) {
String ip = "192,168,30,153";//comma
String[] ss = ip.split(","); //it's comma
for(String s:ss){
System.out.println(s);
}the result is :
192
168
30
153
but when it changs to period nothing printed.
public class Test {
public static void main(String[] args) {
String ip = "192.168.30.153";//period
String[] ss = ip.split("."); //it's period
for(String s:ss){
System.out.println(s);
} thanks.is the regex character that means "any character". If you want to split on a literal period, you need to escape it.
\\. -
hi
if i/p string is 185 the existing query is splitting 92 characters,space and remaining characters(which is greater than 80).
this query is working fine if i/p string length is below 160 since the splitted strings length would be less than 80.
i require a query which would break 185 string in two or three strings but length of each string should be less than 80.
exiting query that i am using
select substr(s_string, 1, trunc(length(s_string) / 2)) || ' ' ||
substr(s_string, trunc((length(s_string / 2))) + 1) from dual;an example would be if there are no space involved:
SQL> Create Or Replace Function fnc_string_split (pPosition Number,
2 pString Varchar2) Return Varchar2 is
3 vSplit Varchar2(2000);
4 vStrLen number := 0;
5 vStrDiv number := 0;
6 Begin
7 vStrLen := Length(pString);
8 vStrDiv := Trunc(vStrLen/pPosition);
9 If vStrDiv > 1 Then
10 For i in 1..vStrDiv Loop
11 If i = 1 Then
12 vSplit := substr(pString,1,pPosition * i);
13 Else
14 vSplit := vSplit ||' '|| substr(pString,pPosition * i, pPosition);
15 End If;
16 End Loop;
17 End If;
18 Return (vSplit);
19 End;
20 /
SQL> select * from string_values;
COL1
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
SQL> select fnc_string_split(80,col1) split
2 from string_values;
SPLIT
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AA A
SQL> -
How to ingore the , within ( ) when i do String.split(",")??
hi guys,
i am currently using java class to read CSV files.
my example code is
String str = dataFile.readLine();
String[] words = str.split (",");
i do not wish to take the , within brackets to be splitted up as in (today,tomorrow), after splitting them i still want them to stick as (today,tomorrow).
for example if the above String str is "(today,tomorrow),yesterday,nextday
after splitting i want the output to be:
(today,tomorrow)
yesterday
nextday
is it possible to do it? anyone help?? thanks!Java does not have an API to do this, also its not fair to ask that. You may need to write your own code to do it. I think its simple as well.
First split on "," and then pass through the array and form the string if the string startswith "(" by appending the next strings untill u get a string which ends with ")".
VJ
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