import java.math.*; /* blah blah */ base = (double)(1 + ( INTEREST_RATE / 12 )); exponent = (double)(paymentsMadeToDate - totalNumOfPayments); powerNum = pow(base, exponent); /* ---------- 1. ERROR in PaymentCalculator.java (at line 37) powerNum = pow(base, exponent); ^^^ The method pow(double, double) is undefined for the type PaymentCalculator.NumericHandler ---------- */