title: google appengine not supporting FileOutputStream
body: <p>I am trying to write to a file in Google appengine but it giving a error message <code>java.io.FileOutputStream is not supported by Google App Engine's Java runtime environment</code></p>
  
  <p>even though I imported </p>
  
  <pre><code>import java.io.File;
  import java.io.FileInputStream;
  
  import java.io.FileOutputStream;
  import java.io.IOException;
  </code></pre>