title: Source not found classloader.class
body: <p>I wrote the following code for reading information from an internet source:</p>
  
  <pre><code>public String ReadUrl(){
      BufferedReader br = null;
      String result = null;
  
      try {
          URL url = new URL(this.url);
          br = new BufferedReader(new InputStreamReader(url.openStream()));
          String line = null;
          while ((line = br.readLine()) != null)
              result += line;
      } catch (IOException e) {
      }
  
      return result;
  }
  </code></pre>
  
  <p><code>this.url</code> looks like: <code>"http://example.com/json.php"</code>. When I want to open this application on a virtual machine I get this error in Eclipse:</p>
  
  <blockquote>
    <p>The source attachment does not contain the source for the file classloader.class</p>
  </blockquote>
  
  <p>Where is the problem? (I updated Eclipse and Android SDK).</p>