title: How to Determine if a String starts with exact number of zeros?
body: <p>How can I know if my string exactly starts with {n} number of leading zeros?
  For example below, the conditions would return true but my real intention is to check if the string actually starts with only 2 zeros.</p>
  
  <pre><code>String str = "00063350449370"
  
  if (str.startsWith("00")) { // true
      ...
  }
  </code></pre>