title: How i can control whether a char[] is null?
body: <p>I wrote  this code to control whether a char[] is null or not.</p>
  
  <pre><code>char[] xxx = new char[9]; 
  
  for (int i = 0; i &lt; 9; ++i)
          {
              if (xxx[i]==null)   
              {
                  xxx[i]=i; 
              }
   }
  </code></pre>