title: What's the default value of char?
body: <pre><code>char c = '\u0000';
  </code></pre>
  <p>When I print <code>c</code>, it shows 'a' in the command line window.</p>
  <p>So what's the default value of a <code>char</code> type field?</p>
  <p>Someone said <code>'\u0000'</code> means null in Unicode; is that right?</p>