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 Excel > JExcel API > How to add Average Formula to Excel Spreadsheet

How to add Average Formula to Excel Spreadsheet 

Java Excel API is an open source java library to read, write and modify Excel spread sheets. This requires the library jxl-2.6.12.jar to be in classpath. The following example shows how to add average formula to a Cell in Excel Spreadsheet.

File Name  :  
com/bethecoder/tutorials/jexcelapi/write/AvgFormulaTest.java 
Author  :  Sudhakar KV
Email  :  kvenkatasudhakar@gmail.com
   
package com.bethecoder.tutorials.jexcelapi.write;

import java.io.File;
import java.io.IOException;

import jxl.Workbook;
import jxl.read.biff.BiffException;
import jxl.write.Formula;
import jxl.write.Label;
import jxl.write.Number;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;

public class AvgFormulaTest {

  /**
   @param args
   @throws IOException 
   @throws IOException 
   @throws WriteException 
   @throws BiffException 
   */
  public static void main(String[] argsthrows IOException, WriteException {
    //Creates a writable workbook with the given file name
    WritableWorkbook workbook = Workbook.createWorkbook(new File("C:/JXL/AvgFormula.xls"));

    WritableSheet sheet = workbook.createSheet("My Sheet"0);

    Number numCell = new Number(1010);
    sheet.addCell(numCell);

    Number numCell2 = new Number(1120);
    sheet.addCell(numCell2);
    
    Number numCell3 = new Number(1230);
    sheet.addCell(numCell3);
    
    Number numCell4 = new Number(1340);
    sheet.addCell(numCell4);
    
    addAvgCells(sheet, "AVERAGE(B1:B2)"4);
    addAvgCells(sheet, "AVERAGE(B3:B4)"5);
    addAvgCells(sheet, "AVERAGE(B1:B4)"6);
    
    //Writes out the data held in this workbook in Excel format
    workbook.write()

    //Close and free allocated memory 
    workbook.close()
  }

  private static void addAvgCells(
      WritableSheet sheet, 
      String formula, int rowthrows RowsExceededException, WriteException {
    
    //Create a formula for average
    Formula formulaCell = new Formula(1, row, formula);
    sheet.addCell(formulaCell);
    
    //Create label for average
    Label formulaLabel = new Label(0, row, formula);
    sheet.addCell(formulaLabel);
  }
}
   

It gives the following output,
avg-formula.gif


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