java - Error message 'Cannot be resolved or is not a field' -

right i'm studying chain of responsibility design pattern , using eclipse.

and i'm trying compile code, have compiling error "islast cannot resolved or not field":

public class overfive implements discount {     private discount next; //     public boolean islast = false;      public void setnext(discount next, boolean last) {         this.next = next;         this.next.islast = last; // here error.     }      public double dodiscount(budget budget) {         if (budget.getvalue() > 500) {             return budget.getvalue() * 0.10;         }         if (this.next.islast == false) {             return next.dodiscount(budget);         }         else {             return 0;         }     } } 

and now, here interface:

public interface discount {      double dodiscount(orcamento orcamento);         void setnext(discount next, boolean last);     } 

here's 1 recommendation: study sun java coding standards , take them heart. you're breaking them in small code sample.

java case sensitive: "discount" not same "discount"; "dodiscount" not same "dodiscount".

public interface discount {      double dodiscount(orcamento orcamento);     void setnext(desconto next, boolean last);     void setlast(boolean last); }  

and implementation:

public class overfive implements discount {     private desconto next;     private boolean last = false;      public void setlast(boolean last) {         this.last = last;     }      public void setnext(desconto next, boolean last) {         this.next = next;         this.setlast(last);       }      // method utter rubbish.  won't compile.     public double dodiscount(orcamento budget){         if (budget.getvalue() > 500){             return budget.getvalue() * 0.10;         }if (this.next.islast == false){             return next.discount(budget);         }else{             return 0;         }        } } 

i think code more little confusing. no wonder you're having problems.