FormulaEvaluator in Apache POI

 import java.io.File;  
 import java.io.FileInputStream;  
 import java.io.IOException;  
 import org.apache.poi.ss.usermodel.Cell;  
 import org.apache.poi.ss.usermodel.FormulaEvaluator;  
 import org.apache.poi.ss.usermodel.Row;  
 import org.apache.poi.ss.usermodel.Sheet;  
 import org.apache.poi.xssf.usermodel.XSSFWorkbook;  
 public class Excel2 {  
      static Object[][] nana = null;  
      public static void read() throws IOException, IOException {  
           String filepath = "C:\\Users\\Mutturaj\\Desktop\\muttu.xlsx";  
           XSSFWorkbook workbook = new XSSFWorkbook(new FileInputStream(new File(filepath)));  
           Sheet sheet = workbook.getSheetAt(0);  
           FormulaEvaluator evaluator = workbook.getCreationHelper().createFormulaEvaluator();  
           for (Row row : sheet) {  
                for (Cell cell : row) {  
                     switch (evaluator.evaluateInCell(cell).getCellType()) {  
                     case Cell.CELL_TYPE_STRING:  
                          System.out.print(cell.getStringCellValue() + "\t\t");  
                          break;  
                     case Cell.CELL_TYPE_NUMERIC:  
                          System.out.print(cell.getNumericCellValue() + "\t\t");  
                     }  
                }  
                System.out.println();  
           }  
      }  
      public static void main(String[] args) throws IOException {  
           Excel2.read();  
      }  
 }