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How to remove whitespaces from string in Java

How to remove whitespaces from string - Java:

package com.javadoc;

* This class is used to remove whitespaces from string.
* @author javadoc
* @version 1.0
* @since 1.8
public class RemoveWhitespaces {
   * This method remove whitespaces from string.
   * @param str String to remove whitespaces.
   * @return String Obtains the string without whitespaces.
   public String removeWhitespaces(String str) {
       //Variable to store the string without whitespaces
       String strWithoutSpaces = "";
       //Remove whitespaces from string
       strWithoutSpaces = str.replaceAll("\\s", "");
       //Return the string without whitespaces
       return strWithoutSpaces;

   * One Example
   public static void main(String args[]) throws IOException {

      RemoveWhitespaces  removeWhitespaces= new RemoveWhitespaces ();
      String strWithoutSpaces = removeWhitespaces.removeWhitespaces("Hello World");
      System.out.println("String without whitespaces :" + strWithoutSpaces); //HelloWorld
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