java - How to call a function with array parameters in main application? -

i've been doing tutorial on inheritance abstract class, , pass array function calculation of total price. then, when tried call function in main, didn't work , i've got error according method call.

here calculation code in subclasses :

public double calcprice(string[] a, int[] qty, int num){     int =0;     for(i=0;i<=num;i++) {          if (a[i]=="a")             price=24.90;     }      double tot=price+qty[i];     return tot; } 

this method call in loop. don't know how call method error says "non-static method calcprice() cannot referenced static context"

for(int i=0;i<=num;i++) {     system.out.println("\t"+a[i]+"\t\t\t"+qty[i]+" "+calcprice());  } 

the main method static, , can't call non-static code. have 2 solutions.

• create instance of class performing calculation, , call calcprice on instance.

• make calcprice static.

i suggest option 1 you've been doing research on classes. practice you.

also not compare variable a "a" ==. use .equals instead. check link why.

edit:

i'm not sure how abstract class plays have no abstract methods needing implementation.

public class calcclass{     public double calcprice(string[] a, int[] qty, int num){         int =0;         for(i=0;i<=num;i++) {              if ("a".equals(a[i]))                price=24.90;         }          double tot=price+qty[i];         return tot;     } }  public class mainclass{     public static void main(string[] args){         //create instance of calc class         calcclass c = new calcclass();         //call calc price method on calcclass         c.calcprice(a, new int[]{1}, 1};     } }