This is my code.
import java.util.*;
public class Main {
    public static void main(String args []){
        Scanner in = new Scanner(System.in);
        double list[]=new double[4];
        double a;
        for(int i=0;i<=3;i++){
            a=in.nextDouble();
            a=Math.sqrt(a);
            list[i]=a;
        }
        for(int j=3;j>=0;j--){
            String text = String.format("%.4f",list[j]).replace(',', '.');
            System.out.println(text);
        }
    }
}
It works correctly on my computer. But if I pass it there will be error in second case.

Edited by author 09.05.2011 20:54

Edited by author 09.05.2011 20:55

Edited by author 09.05.2011 20:55

Imagine, that second test contain more than 4 values ;)