java - android.util.Pair<F, S> example in Android -


i want return tuple of double data types. unable create pair. have read documentation unable make it. doing 

private pair mynums(double f, double s) {         pair<f f, s s> p = pair.create(f, s);         return p;     }

but saying

unknown class f

f , s type. in case double. 

pair<double, double> p = pair.create(f, s);

-

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