Java - Write code to remove Blank from a string by regex

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Requirements

Write code to remove Blank from a string by regex

Demo

//package com.book2s;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static void main(String[] argv) {
        String str = "book2s.com";
        System.out.println(replaceBlank(str));
    }/*  ww w .j  a v  a 2s . com*/

    public static String replaceBlank(String str) {
        String dest = "";
        if (str != null) {
            Pattern p = Pattern.compile("\\s*|\t|\r|\n");
            Matcher m = p.matcher(str);
            dest = m.replaceAll("");
        }
        return dest;
    }
}

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