title: How to get a string between two characters?
body: <p>I have a string,</p>
  
  <pre><code>String s = "test string (67)";
  </code></pre>
  
  <p>I want to get the no 67 which is the string between ( and ).</p>
  
  <p>Can anyone please tell me how to do this?  </p>