Error while compiling excel file in linux

Hiiii.....


I have download Apache POI-src-3.9-2012203.tar.gz. I create a file in java & include poi packages but i have got errors when i compiled the file.Errors are listed below:-
ReadExcelFile.java:7: error: package org.apache.poi.hssf.usermodel does not exist
import org.apache.poi.hssf.usermodel.HSSFCell;
^
ReadExcelFile.java:8: error: package org.apache.poi.hssf.usermodel does not exist
import org.apache.poi.hssf.usermodel.HSSFRow;
^
ReadExcelFile.java:9: error: package org.apache.poi.hssf.usermodel does not exist
import org.apache.poi.hssf.usermodel.HSSFSheet;
^
ReadExcelFile.java:10: error: package org.apache.poi.hssf.usermodel does not exist
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
^
ReadExcelFile.java:11: error: package org.apache.poi.poifs.filesystem does not exist
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
^
ReadExcelFile.java:36: error: cannot find symbol
POIFSFileSystem myFileSystem = new POIFSFileSystem(myInput);
^
symbol: class POIFSFileSystem
location: class ReadExcelFile
ReadExcelFile.java:36: error: cannot find symbol
POIFSFileSystem myFileSystem = new POIFSFileSystem(myInput);
^
symbol: class POIFSFileSystem
location: class ReadExcelFile
ReadExcelFile.java:39: error: cannot find symbol
HSSFWorkbook myWorkBook = new HSSFWorkbook(myFileSystem);
^
symbol: class HSSFWorkbook
location: class ReadExcelFile
ReadExcelFile.java:39: error: cannot find symbol
HSSFWorkbook myWorkBook = new HSSFWorkbook(myFileSystem);
^
symbol: class HSSFWorkbook
location: class ReadExcelFile
ReadExcelFile.java:42: error: cannot find symbol
HSSFSheet mySheet = myWorkBook.getSheetAt(0);
^
symbol: class HSSFSheet
location: class ReadExcelFile
ReadExcelFile.java:48: error: cannot find symbol
HSSFRow myRow = (HSSFRow) rowIter.next();
^
symbol: class HSSFRow
location: class ReadExcelFile
ReadExcelFile.java:48: error: cannot find symbol
HSSFRow myRow = (HSSFRow) rowIter.next();
^
symbol: class HSSFRow
location: class ReadExcelFile
ReadExcelFile.java:52: error: cannot find symbol
HSSFCell myCell = (HSSFCell) cellIter.next();
^
symbol: class HSSFCell
location: class ReadExcelFile
ReadExcelFile.java:52: error: cannot find symbol
HSSFCell myCell = (HSSFCell) cellIter.next();
^
symbol: class HSSFCell
location: class ReadExcelFile
ReadExcelFile.java:66: error: cannot find symbol
HSSFCell myCell = (HSSFCell)cellStoreVector.elementAt(j);
^
symbol: class HSSFCell
location: class ReadExcelFile
ReadExcelFile.java:66: error: cannot find symbol
HSSFCell myCell = (HSSFCell)cellStoreVector.elementAt(j);
^
symbol: class HSSFCell
location: class ReadExcelFile


please help....