user975705 user975705 - 7 months ago 120
Java Question

the correct regex for replacing em-dash with a basic "-" in java

My question concerns the replaceAll method of String class.

My purpose is to replace all the em-dashes in a text with a basic "-".
I know the unicode character of em-dash is \u2014.

I tried it in the following way:

String s = "asd – asd";
s = s.replaceAll("\u2014", "-");

Still, the em-dash is not replaced. What is it I'm doing wrong?


Minor edit after question edit:

You might not be using an em-dash at all. If you're not sure what you have, a nice solution is to simply find and replace all dashes... em or otherwise. Take a look at this answer, you can try to use the Unicode dash punctuation property for all dashes ==> \\p{Pd}

String s = "asd – asd";
s = s.replaceAll("\\p{Pd}", "-");

Working example replacing an em dash and regular dash both with the above code.

public String replaceAll(String regex, String replacement)
Unicode Regular Expressions