Compressing File In Java

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

public class CompressingFile {
    public static void doCompressFile(String inFileName){
        try{
            File file = new File(inFileName);
            System.out.println(" you are going to gzip the  : " + file + "file");
            FileOutputStream fos = new FileOutputStream(file + ".gz");
            System.out.println(" Now the name of this gzip file is  : " + file + ".gz" );
            GZIPOutputStream gzos = new GZIPOutputStream(fos);
            System.out.println(" opening the input stream");
            FileInputStream fin = new FileInputStream(file);
            BufferedInputStream in = new BufferedInputStream(fin);
            System.out.println("Transferring file from" + inFileName + " to " + file + ".gz");
            byte[] buffer = new byte[1024];
            int i;
            while ((i = in.read(buffer)) >= 0){
                gzos.write(buffer,0,i);
            }
            System.out.println(" file is in now gzip format");
            in.close();
            gzos.close();
        }
        catch(IOException e){
            System.out.println("Exception is" + e);
        }
    }
    public static void main(String args[]){
        if(args.length!=1){
            System.err.println("Please enter the file name which needs to be compressed ");
        }
        else{
            doCompressFile(args[0]);
        }
    }
}