New to Java

HEllo techies,
Iam reading an excel sheet which is having many number of rows.
I want to read only one perticular column data in the xcel sheet.
There may chances that each cell may or may not contain the data

import java.io.FileInputStream;
import java.io.IOException;

import org.apache.poi.*;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

class rowCount {
	public static void main(String args[]) {
		try {
			POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(
					args[0]));
			HSSFWorkbook wb = new HSSFWorkbook(fs);
			System.out.println("Number of sheets: " + wb.getNumberOfSheets());
			HSSFSheet sheet = wb.getSheetAt(0);
			int numberOfRows = sheet.getLastRowNum();
			System.out.println("LastRowNumber in sheet0: "
					+ sheet.getLastRowNum());

			for (int i = 0; i <= numberOfRows; i++) {
				HSSFRow row = sheet.getRow(i);
				int cellCount = row.getLastCellNum();
				System.out.println("RowNumber" + i);
				System.out.println("Number of cells in each row" + cellCount);
				for (int j = 0; j < cellCount; j++) {
					HSSFCell cell = row.getCell((short) j);
					if (cell == null) {
						System.out.println("No cell Value");
						continue;
					}
					if (j == 2) {
						// System.out.println("cell");
						System.out.println("RowNumber" + i);
						System.out.println("cell value:  "
								+ cell.getStringCellValue() + "\n");
					}
				}
			}
		} catch (IOException ioe) {
			// TODO: handle exception
			System.out.println("IOException" + ioe.getMessage());
		}

	}
}

Here iam attaching my sample excel sheet also

 A                       B                     C                   D
test	afdjlksf	alsdfkjal	jadfj;asdkjf
sdfajsdfl	asfkajf	asdlfska	adflkal
test	test	test	test
test	test	test	test
test	test	test	
test	test	test	tess
test	test	test	



	test		



	test		

	test

I want to read only values in the column B only.

Can any body guide me how to do this.
If any body guides me i will be very thankfull to him


thanks(inadvance)
ramu.