why i cant access a method in a sub class?

why i can access my method in the subclass???

Code:

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<code>

public abstract class StockItem  implements Comparable, Identifiable{
       
        protected int category; //category of the product could be electrical, dress, or food
       
       
        public StockItem(int category){
                this.category = category;
        }

de>

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Quote:

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Originally Posted by javanew

s[0].setColor("red"); //<<<<<<<<error .. it cant access the method setColor in the abstract clas

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Because that abstract class doesn't have a setColor( ... ) method; neither abstract nor concrete.

kind regards,

Jos

Look at the concrete method in the concrete class DRESS ,, it has the setcolor method()

Quote:

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Originally Posted by javanew

Look at the concrete method in the concrete class DRESS ,, it has the setcolor method()

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Yes I know but your array s is an array of StockItems and that class doesn't even mention the existence of that method so it can't be overridden in a subclass.

kind regards,

Jos

this is polymorphism,,,,
can u help me what to do???
write me a code please

Quote:

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Originally Posted by javanew

this is polymorphism,,,,
can u help me what to do???
write me a code please

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A possibility is to add an abstract method setColor( ... ) in your StockItem class but then all the subclasses thereof are either abstract or have to implement that method.

kind regards,

Jos

i dont want to add an abstract method,,,
the concrete class Dress conatains a method called setColor
how can i access it from the driver:confused:

Quote:

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Originally Posted by javanew

i dont want to add an abstract method,,,
the concrete class Dress conatains a method called setColor
how can i access it from the driver:confused:

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You edited your OP so it can't be seen anymore but you defined a few other abstract methods in that abstract superclass, what is against adding one more? Now StockItems don't have a setColor( ... ) method so you can't set the color when you have a StockItem. Only you know that you have a Dress, the compiler doesn't know that so it whines about it.

kind regards,

Jos