Java: An Introduction to Problem Solving and Programming (7th Edition)
Java: An Introduction to Problem Solving and Programming (7th Edition)
7th Edition
ISBN: 9780133766264
Author: Walter Savitch
Publisher: PEARSON
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Chapter 9.3, Problem 28STQ

Explanation of Solution

Given program segment:

The changed value is highlighted.

//Try block

try

{

    //Assign a value to the variable

    int n = -7;

    //Checking if value is greater than 0

    if(n > 0)

        //Throwing a predefined exception

        throw new Exception();

    //Checking if n is lesser than 0

    else if (n < 0)

        //Throwing user-defined exception

        throw new NegativeNumberException();

    //Else

    else

        //Print Hello

        System.out.println("Hello!");

}

//Catch the user-defined exception

catch (NegativeNumberException e)

{

    //Print the message

    System...

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8. Cash RegisterThis exercise assumes you have created the RetailItem class for Programming Exercise 5. Create a CashRegister class that can be used with the RetailItem class. The CashRegister class should be able to internally keep a list of RetailItem objects. The class should have the following methods: A method named purchase_item that accepts a RetailItem object as an argument. Each time the purchase_item method is called, the RetailItem object that is passed as an argument should be added to the list. A method named get_total that returns the total price of all the RetailItem objects stored in the CashRegister object’s internal list. A method named show_items that displays data about the RetailItem objects stored in the CashRegister object’s internal list. A method named clear that should clear the CashRegister object’s internal list. Demonstrate the CashRegister class in a program that allows the user to select several items for purchase. When the user is ready to check out, the…
5. RetailItem ClassWrite a class named RetailItem that holds data about an item in a retail store. The class should store the following data in attributes: item description, units in inventory, and price. Once you have written the class, write a program that creates three RetailItem objects and stores the following data in them: Description    Units in Inventory    PriceItem #1    Jacket    12    59.95Item #2    Designer Jeans    40    34.95Item #3    Shirt    20    24.95

Chapter 9 Solutions

Java: An Introduction to Problem Solving and Programming (7th Edition)

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