How to remove the backslash in string using regex in Java?
For example:
hai how are\ you?
I want only:
hai how are you?
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3 Answers
str = str.replaceAll("\\\\", "");
or
str = str.replace("\\", "");
replaceAll() treats the first argument as a regex, so you have to double escape the backslash. replace() treats it as a literal string, so you only have to escape it once.
2 Comments
Farid Arshad
Hi, if theres a scenario where 'hai \how are\ you?' , how can we write the regular expression to remvo the last '\' which will result to hai \how are you?
M. H.
But that would remove all "\", what if you just want to remove one not double \\? So something like :) becomes :) but :\\ also becomes :\ ?
You can simply use String.replaceAll()
String foo = "hai how are\\ you?";
String bar = foo.replaceAll("\\\\", "");
1 Comment
Stephen C
Umm ... is that correct? Don't you need to escape the '\' twice? Once for the literal string and once for the regex; e.g.
foo.replaceAll("\\\\", "")String foo = "hai how are\ you?"; String bar = foo.replaceAll("\\", ""); Doesnt work java.util.regex.PatternSyntaxException occurs.... Find out the reason!! @Alan has already answered.. good
String bar = foo.replace("\\", ""); Does work
