LinuxQuestions.org - Copying Files having a certain Extension using java

I Have looked closely at the File class and tried the following piece of code:

Code:

                File x = new File("C:\\cute\\Hotel\\classes");

                if(x.exists())

                {

                        for(int i=0;i<x.listFiles().length;i++)

                        {

                                System.out.println(x.listFiles()[i].getAbsolutePath());

                        }

                }

This has returned:

Code:

C:\cute\Hotel\classes\AddItem.txt

C:\cute\Hotel\classes\agent$1.class

C:\cute\Hotel\classes\agent$2.class

C:\cute\Hotel\classes\agent$3.class

C:\cute\Hotel\classes\agent$4.class

C:\cute\Hotel\classes\agent.class

C:\cute\Hotel\classes\ArrivalList$Report.class

C:\cute\Hotel\classes\ArrivalList.class

C:\cute\Hotel\classes\category.class

C:\cute\Hotel\classes\currencytype.class

C:\cute\Hotel\classes\currency_type.class

C:\cute\Hotel\classes\DepartureList$Report.class

C:\cute\Hotel\classes\DepartureList.class

C:\cute\Hotel\classes\drvsel.class

C:\cute\Hotel\classes\FocusController.class

C:\cute\Hotel\classes\Fontings.txt

C:\cute\Hotel\classes\Hotel.class

C:\cute\Hotel\classes\hoteldet$1.class

C:\cute\Hotel\classes\hoteldet$2.class

C:\cute\Hotel\classes\hoteldet.class

C:\cute\Hotel\classes\hotelfile.class

C:\cute\Hotel\classes\hotelRef.class

C:\cute\Hotel\classes\menuload.class

C:\cute\Hotel\classes\MyVerifier.class

C:\cute\Hotel\classes\ratetype.class

C:\cute\Hotel\classes\room$1.class

C:\cute\Hotel\classes\room.class

C:\cute\Hotel\classes\roomtype.class

C:\cute\Hotel\classes\seasonfile.class

C:\cute\Hotel\classes\taxitype.class

C:\cute\Hotel\classes\tourtype.class

C:\cute\Hotel\classes\HotelInvRep.class

C:\cute\Hotel\classes\HotelInvRep$Report.class

C:\cute\Hotel\classes\airports.class

Now i want to filter these results as to extract only the files with extension *.class and copy them to a different computer.
For that there is the method

x.listFiles(FileFilter filter);

but i don't know how to use that one!