Program is in Java 1.8 but gives wrong answer on the timus server. Any help will be appreciated. Thanks a lot.

import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;


public class ReverseRoot {

    public static void main(String[] args) throws IOException {
        Scanner in = new Scanner(System.in);
        PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
        List<Long> list = new ArrayList<Long>();
        while ( in.hasNextLong() ) {
            long l = in.nextLong();
            list.add(l);
        }
        DecimalFormatSymbols s = new DecimalFormatSymbols();
        s.setDecimalSeparator('.');
        DecimalFormat df = new DecimalFormat("#,####0.0000",s);
        for (int i = list.size() - 1; i >= 0; --i) {
            out.println(df.format(Math.sqrt(list.get(i))));
            out.flush();
        }

    }
}