title: java class reference issue between two jars
body: <p>I have a java class to process XLS file and using apache poi jar (poi-ooxml-3.8-20120326.jar) to do so. Also i have recently deployed BIRT jar's to generate some reports. Here onwards when i call my java class for XLS processing, getting the below error. </p>
  
  <pre><code>java.lang.NoSuchMethodError: org.apache.poi.ss.usermodel.WorkbookFactory.create(Ljava/io/File;)Lorg/apache/poi/ss/usermodel/Workbook;
  </code></pre>
  
  <p>i found that 'WorkbookFactory' class is also available in BIRT related jars (org.eclipse.birt.runtime_4.2.1.v20120918-1113.jar) and the specified method is not available in this jar. This might be causing the above exception.</p>
  
  <p>How to resolve this issue by having both the jars(POI and BIRT) deployed in server. </p>