java - Incompatible types: possible lossy conversion from double to int -

help? don't know why getting error. getting @ in line 39:

term[1] = differentiate(coeff[1], exponent[1]); 

how can fix issue?

full code listing:

public class calcprog {      public static void main(string[] args) {         scanner input = new scanner(system.in);         int numterms = 7;         double[] coeff = new double[6];         double[] exponent = new double[6];         string[] term = new string[6];          system.out.println("enter number of terms in polynomial:");         numterms = input.nextint();          while (numterms > 6) {             if (numterms > 6) {                 system.out.println("please limit number of terms six.");                 system.out.println("enter number of terms in polynomial:");                 numterms = input.nextint();             }         }          (int = 1; < numterms + 1; i++) {             system.out.println("please enter coefficient of term #" + + " in decimal form:");             coeff[i] = input.nextdouble();             system.out.println("please enter exponent of term #" + + " in decimal form:");             exponent[i] = input.nextdouble();         }         term[1] = differentiate(coeff[1], exponent[1]);     }      public string differentiate(int co, int exp) {         double newco, newexp;         string derivative;         newexp = exp - 1;         newco = co * exp;         derivative = double.tostring(newco) + "x" + double.tostring(newexp);         return derivative;     } } 

you trying pass double arguments method accepts ints, requires casting may result in loss of information.

you can make work explicit cast :

term[1] = differentiate((int)coeff[1], (int)exponent[1]); 

or can change differentiate method accept double arguments, make more sense :

public string differentiate(double co, double exp)