Decompressing a File
This example reads a ZIP file and decompresses the first entry. 

     try {
         String inFilename = "infile.zip";
         String outFilename = "outfile";
         ZipInputStream in = new ZipInputStream(
           new FileInputStream(inFilename));
         OutputStream out = new FileOutputStream(
           outFilename);
     
         ZipEntry entry;
         byte[] buf = new byte[1024];
         int len;
     
           if ((entry = in.getNextEntry()) != null) {
               while ((len = in.read(buf)) > 0) {
                   out.write(buf, 0, len);
               }
           }
         out.close();
         in.close();
     } catch (IOException e) {
     }