guess what this does

    public static void main(String[]args) {

        String[] args1={"0660", "0661", "0662", "0686", "0734", "0754", "0770","0762",
                "0766","0803", "0806", "0802", "0844", "0856", "0858", "0853", "0866",
                "0887", "0893","0918", "0921", "1051", "1037", "1040", "1053", "1058", "1107", "1111",
                "1113",  "1143", "1160", "1218", "1256", "0646", "1331", "1338", "1340", "1373", "1380",
                "1388", "1428", "1444", "1446", "1448", "1455", "1458", "1495", "1505", "1543", "1554", "1575", "1579"};



        File source = new File("D:\\");
        File target = new File("B:\\pops/");

        String[] fileName = source.list();
        File[] files = source.listFiles();//corresponding 1-1

        for (int i=0 ; i<args1.length ; i++) {

            for (int j=0 ; j<fileName.length ; j++) {

                if (fileName[j].contains(args1[i])){//compare file names {
                    File temp = new File(target.toPath()+fileName[i]);
                    try {
                        Files.copy(files[j].toPath(),temp.toPath() );
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                        break;
                    }
                }//endif

            }//end inner for


        }//end outer for
        System.out.print("job complete!");

    }}