Adding Files in Jar Files

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.util.jar.JarEntry;

import java.util.jar.JarOutputStream;

import java.util.jar.Manifest;

public class CreateJarFile {

  public static int BUFFER_SIZE = 10240;

  protected  void createJarArchive(File archiveFile, File[] tobeJared) {

    try {

      byte buffer[] = new byte[BUFFER_SIZE];

      // Open archive file

      FileOutputStream stream = new FileOutputStream(archiveFile);

      JarOutputStream out = new JarOutputStream(stream, new Manifest());

      for (int i = 0; i <>

        if (tobeJared[i] == null || !tobeJared[i].exists()

            || tobeJared[i].isDirectory())

          continue; // Just in case...

        System.out.println("Adding " + tobeJared[i].getName());

        // Add archive entry

        JarEntry jarAdd = new JarEntry(tobeJared[i].getName());

        jarAdd.setTime(tobeJared[i].lastModified());

        out.putNextEntry(jarAdd);

        // Write file to archive

        FileInputStream in = new FileInputStream(tobeJared[i]);

        while (true) {

          int nRead = in.read(buffer, 0, buffer.length);

          if (nRead <= 0)

            break;

          out.write(buffer, 0, nRead);

        }

        in.close();

      }

      out.close();

      stream.close();

      System.out.println("Adding completed OK");

    } catch (Exception ex) {

      ex.printStackTrace();

      System.out.println("Error: " + ex.getMessage());

    }

  }

  public static void main(String args[]) {

   File f=new File("c:\\abc");

   File af=new File("c:\\xyz.jar");

   new createJarFile().createJarArchive(af,f.listFiles());

    

}

  

}