Apache Poi example

package hsenidmobile.idews.datacollector;

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.RichTextString;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;

public class POIExcelReader {

    public POIExcelReader() {
    }

    public void displayFromExcel(String xlsPath) {
        InputStream inputStream = null;
        try {
            inputStream = new FileInputStream(xlsPath);
        }
        catch (FileNotFoundException e) {
            System.out.println("File not found in the specified path.");
            e.printStackTrace();
        }
        try {
            Workbook wb = WorkbookFactory.create(inputStream);
            Sheet sheet = wb.getSheetAt(29);
            Iterator rows = sheet.rowIterator();

            System.out.println("get the new sheet ?>>>>>");
            while (rows.hasNext()) {
                Row row = rows.next();
                System.out.println();
                System.out.println("Row No.: " + (row.getRowNum() + 1));
                Iterator cells = row.cellIterator();

                while (cells.hasNext()) {
                    Cell cell = cells.next();


                    switch (cell.getCellType()) {
                        case Cell.CELL_TYPE_FORMULA: {
                            switch(cell.getCachedFormulaResultType()){
                                case Cell.CELL_TYPE_NUMERIC:{
                                    System.out.print("  Cell No.: " + cell.getColumnIndex());
                                    System.out.print("   Numeric value: " + cell.getNumericCellValue());
                                    break;
                                }
                            }
                            break;
                        }
                        case Cell.CELL_TYPE_NUMERIC: {
                            System.out.print("  Cell No.: " + cell.getColumnIndex());
                            System.out.print("   Numeric value: " + cell.getNumericCellValue());
                            break;
                        }
                        case Cell.CELL_TYPE_STRING: {
                            RichTextString richTextString = cell.getRichStringCellValue();
                            if(richTextString.getString()!=null && !richTextString.getString().trim().equals("")){
                                System.out.print("  Cell No.: " + cell.getColumnIndex());
                                System.out.print("  String value: " + richTextString.getString());
                            }
                            break;
                        }
                        default: {
//                            System.out.print("  Type not supported.");
                            break;
                        }
                    }
                }
            }
        }
        catch (IOException e) {
            e.printStackTrace();
        } catch (InvalidFormatException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        POIExcelReader poiExample = new POIExcelReader();
//        String xlsPath = "/home/rasika/dev/idews/Data_Vekpro_2006.xls";
        String xlsPath = "/home/rasika/dev/idews/Mg_01.xls";

        poiExample.displayFromExcel(xlsPath);
    }
}