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

TimesheetDemo example in the Apache POI package is created by Yegor Kozlov. It can be used to generate a weekly timesheet with automatic calculation of total hours. It demonstrates advance usage of cell formulas.

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

Here is the command to run TimesheetDemo to generate a timesheet in *.xlsx file format compatible with Microsoft Excel 2007 version. Note that additional JAR files are needed to generate *.xlsx files.

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 
         C:\local\poi-3.15\ooxml-lib\xmlbeans-2.6.0.jar;
         C:\local\poi-3.15\lib\commons-collections4-4.1.jar;
         C:\local\poi-3.15\poi-ooxml-schemas-3.15.jar 
   org.apache.poi.ss.examples.TimesheetDemo -xlsx

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

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