问题:

I have a String variable that contains '*' in it. But Before using it I have to replace all this character.

I've tried replaceAll function but without success:

text = text.replaceAll("*","");
text = text.replaceAll("*",null);

Could someone help me? Thanks!

回答1:

Why not just use String#replace() method, that does not take a regex as parameter: -

text = text.replace("*","");

In contrary, String#replaceAll() takes a regex as first parameter, and since * is a meta-character in regex, so you need to escape it, or use it in a character class. So, your way of doing it would be: -

text = text.replaceAll("[*]","");  // OR
text = text.replaceAll("\\*","");

But, you really can use simple replace here.

回答2:

you can simply use String#replace()

text = text.replace("*","");

String.replaceAll(regex, str) takes regex as a first argument, as * is a metachacter you should escape it with a backslash to treat it as a normal charcter.