java - Cannot find symbol - method -

having hard time calling method in main. keeps saying cannot find symbol - method addsales(double)

i doing project programming because learnt inheritance , has 3 super classes , 3 sub classes. having problem 1 sub , super class. named hourly , commission. commission extends hourly. feel have written method called addsales correctly when call in main says cannot find method. missing here? appreciated.

commission class:

public class commission extends hourly { private double totalsales, commission;  public commission(string ename, string eaddress, string ephone, string socsecnumber, double rate, double commissionrate) {     super(ename, eaddress, ephone, socsecnumber, rate);     totalsales = 0.0;     commission = commissionrate; }  public double pay() {     double payment = super.pay();     payment = (payment + (commission * totalsales));     return payment; } public string tostring() {     string result = super.tostring();     result += "total sales: " + totalsales;      return result;  } public void addsales(double totals) {     totalsales = totalsales + totals; } } 

hourly class:

public class hourly extends employee { private int hoursworked;  //----------------------------------------------------------------- //  sets hourly employee using specified information. //----------------------------------------------------------------- public hourly (string ename, string eaddress, string ephone, string socsecnumber, double rate) {     super (ename, eaddress, ephone, socsecnumber, rate);      hoursworked = 0; }  //----------------------------------------------------------------- //  adds specified number of hours employee's //  accumulated hours. //----------------------------------------------------------------- public void addhours (int morehours) {     hoursworked += morehours; }  //----------------------------------------------------------------- //  computes , returns pay hourly employee. //----------------------------------------------------------------- public double pay() {     double payment = payrate * hoursworked;      hoursworked = 0;      return payment; }  //----------------------------------------------------------------- //  returns information hourly employee string. //----------------------------------------------------------------- public string tostring() {     string result = super.tostring();      result += "\ncurrent hours: " + hoursworked;      return result; } } 

main:

public class firm { //-------------------------------------------------------------- //  creates staff of employees firm , pays them. //-------------------------------------------------------------- public static void main (string[] args) {     staff personnel = new staff(8);      executive staff0 = new executive ("sam", "123 main line", "555-0469", "123-45- 6789", 2423.07);     staffmember staff1 = new employee ("carla", "456 off line", "555-0101", "987-65-4321", 1246.15);     staffmember staff2 = new employee ("woody", "789 off rocker", "555-0000", "010-20-3040", 1169.23);      hourly staff3 = new hourly ("diane", "678 fifth ave.", "555-0690", "958-47-3625", 10.55);      hourly staff6 = new commission("marcus gendron", "66 highland st.", "272-9555", "123-62-5678", 6.25, 0.20);     hourly staff7 = new commission("joe dangerous", "55 dude court", "555-1267", "777-66-5555", 9.75, 0.15);      staffmember staff4 = new volunteer ("norm", "987 suds blvd.", "555-8374") ;     staffmember staff5 = new volunteer ("cliff", "321 duds lane", "555-7282");        personnel.addstaff(staff0);     personnel.addstaff(staff1);     personnel.addstaff(staff2);     personnel.addstaff(staff3);     personnel.addstaff(staff4);     personnel.addstaff(staff5);     personnel.addstaff(staff6);     personnel.addstaff(staff7);          staff6.addhours(35);     staff6.addsales(400.0);       //error being shown here ^^^^       staff7.addhours(40);     staff7.addsales(950.00);     staff0.awardbonus (500.00);     staff3.addhours (40);     personnel.payday(); } } 

both staff6 , staff7 instances of hourly. hourly class not have particular method attached it.

you have declare them concrete instances of commission instead.