String replaceAll doesn't like commas

[O.B.]

Why doesn't the following turn "Bubba, Inc." into "Bubba\, Inc."?

String test = "Bubba, Inc.";
test = test.replaceAll(",", "\\,");

 

[Stefan Ram]

Why doesn't the following turn "Alpha, Inc." into "Alpha\, Inc."?
String test = "Alpha, Inc.";
test = test.replaceAll(",", "\\,");

Why not just read about it in the documentation?

http://download.java.net/jdk6/docs/...eplaceAll(java.lang.String, java.lang.String)

 

[O.B.]

Why not just read about it in the documentation?

http://download.java.net/jdk6/docs/...eplaceAll(java.lang.String, java.lang.String)

What's wrong with my regular expression?

 

[George]

Why doesn't the following turn "Bubba, Inc." into "Bubba\, Inc."?

String test = "Bubba, Inc.";
test = test.replaceAll(",", "\\,");

Try this:

test = test.replaceAll(",", "\\\\,");

 

[mikm]

Change "\\," to "\\\\,"

 

[Jeffrey Schwab]

Why doesn't the following turn "Bubba, Inc." into "Bubba\, Inc."?

String test = "Bubba, Inc.";
test = test.replaceAll(",", "\\,");

The double quotes eat one backslash. The regex parser eats the other.
Try "\\\\,".

 

[Roedy Green]

String test = "Bubba, Inc.";
test = test.replaceAll(",", "\\,");

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

 

[Roedy Green]

What's wrong with my regular expression?

\\ is a magic character to regexes and in a magic character to Java
string literals. You have to "quote" it for both. The docs are not
clear unless you read up on Matcher.replaceAll, but he second parm is
a regex too, not just a simple string.

See http://mindprod.com/jgloss/regex.html#QUOTING
http://mindprod.com/regex.html#AWKWARD

 

[Roedy Green]

\\ is a magic character to regexes and in a magic character to Java
string literals. You have to "quote" it for both. The docs are not
clear unless you read up on Matcher.replaceAll, but he second parm is
a regex too, not just a simple string.

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

 

[Alan Krueger]

The double quotes eat one backslash. The regex parser eats the other.
Try "\\\\,".

It gets really fun when you want to quote backslashes in a string with
an additional backslash:

someString.replaceAll("\\\\", "\\\\\\\\");

That's a lot of backslashes.

 

[Stefan Ram]

someString.replaceAll("\\\\", "\\\\\\\\");
That's a lot of backslashes.

class String
{ final java.lang.String string;
public String( final java.lang.String string )
{ this.string = string; }
public java.lang.String replaceAll
( final java.lang.String search,
final java.lang.String replace )
{ return this.string.replaceAll
( java.util.regex.Pattern.quote( search ),
java.util.regex.Matcher.quoteReplacement( replace )); }}
public class Main
{ public static void main( final java.lang.String[] args )
{ java.lang.System.out.println
( new String( "a\\b" ).replaceAll( "\\", "\\\\" )); }}

 

[Alan Krueger]

{ return this.string.replaceAll
( java.util.regex.Pattern.quote( search ),
java.util.regex.Matcher.quoteReplacement( replace )); }}

Some of us don't have the pleasure of being able to target a 1.5 JRE/JDK
yet.