What is CalendarDemo example in the Apache POI package? How to run CalendarDemo example?

CalendarDemo example in the Apache POI package is created by Yegor Kozlov. It can be used to generate a monthly calendar with each month on a separate sheet.

CalendarDemo example uses the Common Spreadsheet Format (SS) API, which supports Excel files in both *.xls and *.xlsx formats.

Here is the command to run CalendarDemo to generate 2016 calendar in *.xls file format compatible with Microsoft Excel 97 version.

C:\fyicenter>\local\jdk-1.8.0\bin\java
   -cp .;C:\local\poi-3.15\poi-examples-3.15.jar;
         C:\local\poi-3.15\poi-3.15.jar;
         C:\local\poi-3.15\poi-ooxml-3.15.jar 
   org.apache.poi.ss.examples.CalendarDemo -xls 2016

If you open the output file, calendar.xls, in Excel, you will see a nice looking calendar as shown below:

⇒Apache POI Examples for Excel Files

⇒⇒FAQ for Apache POI (Poor Obfuscation Implementation)