title: Remove parentheses, dashes, and spaces from phone number
body: <p>I have a phone number like (123) 456-7890. I am using the <code>replaceAll</code> method to remove <code>()</code> and <code>-</code> and spaces from the string. I tried following</p>
  
  <pre><code>String phNo= "(123) 456-7890".replaceAll("[()-\\s]").trim();
  </code></pre>
  
  <p>but it's not working. Any solution?</p>