import  java.io.*;
  import  java.util.zip.*;
  import  java.util.zip.ZipFile;
  import  java.util.*;


  public   class  cl {

  public   static   void  main(String[] args)  throws  IOException {
          int  bufSize =  1024 ;
         String dir= "C:\\temp\\arx";
         String file_name = "ar1.rar";
         String package_name = "ar1";
         
         ZipFile zf =  new  ZipFile(dir+"\\"+file_name);
         Enumeration e = zf.entries();
         while (e.hasMoreElements()){
             ZipEntry ze = (ZipEntry)e.nextElement();
             if (!ze.isDirectory()) {
                 (new File(dir+package_name)).mkdir();
             }
             
             InputStream is = zf.getInputStream(ze);
             byte data[] = new byte[bufSize];
             int len;
             
                         
             BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(dir+"\\"+package_name+"\\" + ze.getName()));
              while  ((len = is.read(data)) >=  0 ) {
                 bos.write(data,  0 , len);
             }
             is.close();
             bos.close();
         }
         zf.close();
 }
 }