Unzip files from a folder which is updating regularly using multithreading

Question

Hi All,
I have acode which unzip all the files from a folder .This code picks up all the zipped files at a time and then unzip it and write them to another folder but now my requirement is changed ,suppose the source folder where all the zipped files are present is refreshed or updated with new zipped files regularly then how can I implement in my code multithreading to get several files by threads and send it for unzipping.
Please suggest with some example or edit my code.
package com.myprojcet;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
public class Main {
     * Extracts a zip file
     public void extractZipFile() {
          try {
               String zipFileName = "C:\\soft\\test"; //Source folder for zipped files
               //Create input and output streams
               File SourceDir = new File(zipFileName);
               File[] zipFiles = SourceDir.listFiles();
               ZipInputStream inStream = null;
               OutputStream outStream = null;
               ZipEntry entry;
               byte[] buffer = new byte[1024];
               int nrBytesRead;
               //Get next zip entry and start reading data
          for(int i=0; i < zipFiles.length; i++) {
               inStream= new ZipInputStream(new FileInputStream(zipFiles));
               while((entry = inStream.getNextEntry()) != null) {
                    outStream=new FileOutputStream("C:\\soft\\test2\\"+entry.toString()); //destination folder for unzipped file
                    while ((nrBytesRead = inStream.read(buffer)) > 0) {     
                         outStream.write(buffer, 0, nrBytesRead);
               //Finish off by closing the streams
               outStream.close();
               inStream.close();
          } catch (IOException ex) {
               ex.printStackTrace();
     * @param args the command line arguments
     public static void main(String[] args) {
          new Main().extractZipFile();
Thanks
Sumit
Edited by: user8687839 on Feb 27, 2012 11:00 PM

Answer 1

But my question is that if in a source folder we have several files which are in zipped format and the folder is getting updated every min (say) with new zipped files (which are dumped from some outside environment).I need to unzip all the files present in the folder ,if new one comes there then also check for the new zipped file and unzip it.You don't need to keep re-stating that.
I had written a code for unzipping a file from a folder (thinking the folder is not updated everytime).Or that.
Now I am thinking of using threads because if I create suppose 5 threads and every threads poll the source folder and pick up a zip file ,send it for unzipping it and again poll the source folder for any new entries?Or that.
If using the threads here hits performace then what should I use?Err, what you presently have?
Provide me any sample code or link that would be more useful.You've already written it.