Removing pipes from a string

[Tom Gur]

Hi,

I need to strip all of the pipe-characters of a string. normally I
would use something like:
str.replaceAll("the-char-i-want-to-replace", "");
But from some reason: str.replaceAll("|", "") do not alter the string.
currently I've wrote something like that:

private static String strip_for_validation(String str) {
return str.lastIndexOf('|') == -1 ? str.replaceAll(" ", "") :
strip_for_validation(str.substring(0,str.lastIndexOf('|')) +
str.substring(str.lastIndexOf('|')+1));
}

But is there any alteration I can make in order to use the much more
readable replaceAll method ?

 

[Robert Klemme]

I need to strip all of the pipe-characters of a string. normally I
would use something like:
str.replaceAll("the-char-i-want-to-replace", "");
But from some reason: str.replaceAll("|", "") do not alter the string.

Strings are immutable so no method will alter the string.

Second, I suggest you read the docs at

http://java.sun.com/j2se/1.5.0/docs...eplaceAll(java.lang.String, java.lang.String)

The first string is a regexp and as it happens, a pipe symbol is a meta
character. So you need to escape it.

currently I've wrote something like that:

private static String strip_for_validation(String str) {
return str.lastIndexOf('|') == -1 ? str.replaceAll(" ", "") :
strip_for_validation(str.substring(0,str.lastIndexOf('|')) +
str.substring(str.lastIndexOf('|')+1));
}

But is there any alteration I can make in order to use the much more
readable replaceAll method ?

See above.

Kind regards

robert

 

[Tom Gur]

Strings are immutable so no method will alter the string.

Second, I suggest you read the docs at

http://java.sun.com/j2se/1.5.0/docs/api/java/lang/String.html#replace...)

The first string is a regexp and as it happens, a pipe symbol is a meta
character. So you need to escape it.




See above.

Kind regards

robert

Thanks, found it.
Since Java doesn't accept "\|", you can just type "\\|" so the regular
expression will read the pipe literally.
So, str.replaceAll("\\|", "") works fine.

 

[Piotr Kobzda]

So, str.replaceAll("\\|", "") works fine.

Just as str.replace("|", "") do.


piotr

 

[Tom Gur]

actually replace() receives 2 chars, not strings - so str.replace("|",
"") is illegal.

 

[Piotr Kobzda]

actually replace() receives 2 chars, not strings - so str.replace("|",
"") is illegal.

Since Java 5, it's legal as well.

<http://java.sun.com/j2se/1.5.0/docs...va.lang.CharSequence, java.lang.CharSequence)>


piotr

 

[Tom Gur]

Since Java 5, it's legal as well.

<http://java.sun.com/j2se/1.5.0/docs/api/java/lang/String.html#replace...)>

piotr

ok, thanks

 

[Roedy Green]

But from some reason: str.replaceAll("|", "") do not alter the string.
currently I've wrote something like that:

see http://mindprod.com/jgloss/string.html

The catch is, replaceAll is use regexes.

see http://mindprod.com/jgloss/regex.html