QuestionQuestion

Write ONE application program by using the following requirements:
1. File input and output
2. Exception handling
a. You can create your own exception classes or
b. You can using existing exception classes from Java API
3. Inheritance
a. At least one superclass or abstract superclass: this class needs to have data members, accessor, mutator, and toString methods
b. At least one subclass: this class also needs to have data members, accessor, mutator, and toString methods
c. At least one interface: this interface needs to have at least two abstract methods
d. At least one method overloading
e. At least one method overriding
f. At least one static member and one static method
g. Polymorphism: you need to have at least one superclass reference to reference objects of a subclass
h. At least one aggregation in a class

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// a. At least one superclass or abstract superclass: this class needs to have data members, accessor, mutator, and toString methods (10 points)
public abstract class Item implements Service{   
    private double price;
    //f. At least one static member and one static method
    private static int numberOfItems = 0;
    private int id;
   
    public Item(double price) {
       this.price = price;
       this.id = ++numberOfItems;
    }

    public double getPrice() {
       return price;
    }

    public void setPrice(double price) {
       this.price = price;
    }...

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