title: GMT Timezone from Zone Id
body: <p>I need to get the GMT Time zone value in the following format: <code>GMT+05:30</code> or <code>MST-07:00</code> from the zone ID in Java.</p>
  
  <p>Egs of zone IDs:</p>
  
  <pre><code>String zoneId ="America/Phoenix" or "Asia/Calcutta"
  </code></pre>