Menu
I am new in java. I am getting java Stack overflow Exception in regex strHindiText. What should I do for that?
try {
// This regex convert the pattern "{\fldrslt {\fcs1 \ab\af24 \fcs0 ऩ}{"
// into "{\fldrslt {\fcs1 \ab\af24 \fcs0 ऩ}}}{"
// strHindiText = strHindiText.replaceAll("\\{(\\\\fldrslt[ ])\\{((\\\\\\S+[ ])+)((\\s*&#\\d+;\\s*(-|,|/|\\(|\\)|\"|;|\\.|'|<|>|:|\\?)*)+)\\}\\{","{$1{$2$4}}}{");
// This regex convert the pattern "{\fcs0 \af0 ऩ{ or {\fcs0 \af0 *\tab ऩ{"
// into "{\fcs0 \af0 ऩ }{"
strHindiText = strHindiText.replaceAll("\\{\\s*((\\\\\\S+[ ](\\*)?)+\\s*)(-|,|/|\\(|\\)|\"|;|\\.|'|<|>|:|\\?)*[ ]*(((&#\\d+;)[ ]*(-|,|/|\\(|\\)|\"|;|\\.|'|<|>|:|\\?)*[ ]*)+)\\{", "{$1 $4$5 }{");
// This regex convert the pattern "{ऩ \fcs0 \af0 {"
// into "{ऩ \fcs0 \af0 }{"
strHindiText = strHindiText.replaceAll("\\{\\s*(((&#\\d+;)[ ]*(-|,|/|\\(|\\)|\"|;|\\.|'|<|>|:|\\?)*[ ]*)+)[ ]*((\\\\\\S+[ ])+)\\{", "{$1 $5 }{");
} catch(StackOverflowError er) {
System.out.println("Third try Block StackOverflowError in regex pattern to reform the rtf tags................");
er.printStackTrace();
// throw er;
}
Whenever these strHindiText contain large data it gives an java stackoverflow exception:
java.lang.StackOverflowError
2013-08-08 15:35:07,743 ERROR [STDERR] (http-127.0.0.1-80-9) at java.util.regex.Pattern$Curly.match0(Pattern.java:3754)
2013-08-08 15:35:07,743 ERROR [STDERR] (http-127.0.0.1-80-9) at java.util.regex.Pattern$Curly.match(Pattern.java:3744)
2013-08-08 15:35:07,744 ERROR [STDERR] (http-127.0.0.1-80-9) at java.util.regex.Pattern$GroupTail.match(Pattern.java:4227)
2013-08-08 15:35:07,744 ERROR [STDERR] (http-127.0.0.1-80-9) at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3366)
2013-08-08 15:35:07,745 ERROR [STDERR] (http-127.0.0.1-80-9) at java.util.regex.Pattern$Curly.match0(Pattern.java:3782)
2013-08-08 15:35:07,745 ERROR [STDERR] (http-127.0.0.1-80-9) at java.util.regex.Pattern$Curly.match(Pattern.java:3744)
My strHindiText data is:
`{\rtlch\fcs1 \af1\afs18 \ltrch\fcs0 \f1\fs18\cf21\insrsid13505584 भोपाल  । \par }\pard\plain \ltrpar\s16\ql \li0\ri0\sb100\sa100\sbauto1\saauto1\sl240\slmult0\widctlpar\wrapdefault\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0\pararsid13505584 \cbpat20 \rtlch\fcs1 \af0\afs24\alang1025 \ltrch\fcs0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 {\rtlch\fcs1 \ab\af1\afs18 \ltrch\fcs0 \cs21\b\f1\fs18\cf21\insrsid13505584 अन्वेषण करें  :}{\rtlch\fcs1 \af1\afs18 \ltrch\fcs0 \f1\fs18\cf21\insrsid13505584 \par भोपाल , मध्य प्रदेश की राजधानी प्राकृतिक सुंद`
607
Regular expressions provide a declarative language to match patterns within strings. They are commonly used for string validation, parsing, and transformation.
The backslash \ is an escape character in Java Strings. That means backslash has a predefined meaning in Java. You have to use double backslash \\ to define a single backslash. If you want to define \w , then you must be using \\w in your regex.
Regular expressions can be used to perform all types of text search and text replace operations. Java does not have a built-in Regular Expression class, but we can import the java. util. regex package to work with regular expressions.
[] denotes a character class. () denotes a capturing group. [a-z0-9] -- One character that is in the range of a-z OR 0-9. (a-z0-9) -- Explicit capture of a-z0-9 .
Look for recursive calls in your regex.
If you are not sure where your problem lies: try a regex tester like this.
Don't use a regex if there are better tools for your task.
In your case you could: Search for a RTF parsing library or write your own parser.
e.g. like the one here that jahroy pointed out in the comments.
145
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
