import java.util.Comparator;
public class Test1 implements Comparator<Double>{
public int compare(Double o1, Double o2) {
return o1.compareTo(o2);
}
public static void main(String[] args) {
Test1 t = new Test1();
double i=10,j=9;
System.out.println(t.compare(j, i));
}
}