How to create a zip file by converting jar file using Java API

//Sample example to create a zip file from a jar file using java api.

package com.gaurav.java.others;

 

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.GZIPOutputStream;

public class GZipFile {

 private static final String OUTPUT_GZIP_FILE = "C:/zipFolder/javaee.zip";
 private static final String SOURCE_FILE = "C:/zipFolder/javaee.jar";

public static void main(String[] args) {

                 GZipFile gZip = new GZipFile();
                 gZip.gzipIt();
              }

 /**
  * GZip it
  *
  * @param zipFile
  *            output GZip file location
  */
 public void gzipIt() {

          byte[] buffer = new byte[1024];

             try {

                   GZIPOutputStream gzos = new GZIPOutputStream(new FileOutputStream(
                   OUTPUT_GZIP_FILE));

                   FileInputStream in = new FileInputStream(SOURCE_FILE);

                   int len;
                     while ((len = in.read(buffer)) > 0) {
                     gzos.write(buffer, 0, len);
                    }

                  in.close();

                  gzos.finish();
                  gzos.close();

                  System.out.println(" File Convertion Completed");

            } catch (IOException ex) {
          ex.printStackTrace();
         }
     }

}