How to delete those punctuation?

Question

    public class test {
    public static void main(String[] args) {
        String a = "so many, punctuations , haha!";
        a.replaceAll("[\\p{Punct}]+", "");
        System.out.print(a);
    }
}

I try this method, but the punctuation in a is still there, I don't understand why.

The replaceAll() function didn't work.

Answer 1

You need to do this:

a = a.replaceAll("[\\p{Punct}]+", "");