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What is the value of finalAmount after executing the following code? ( Assume each class is defined in a separate java file). public class CashRegister {

What is the value of finalAmount after executing the following code? ( Assume each class is defined in a separate java file). public class CashRegister {

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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### Question 7 **Problem Statement:** What is the value of `finalAmount` after executing the following code? (Assume each class is defined in a separate java file). **Code Explanation:** ```java public class CashRegister { private String cashierName; private double initialBalance; private String transactionNum; public void setInitialBalance(double inBalance) { initialBalance = inBalance; } public double getInitialBalance() { return initialBalance; } public void addBonus(double bonusPer, double amount) { initialBalance += initialBalance * bonusPer + amount; } } ``` The `CashRegister` class contains: - Three private instance variables: `cashierName`, `initialBalance`, and `transactionNum`. - A public method `setInitialBalance(double inBalance)` to set the initial balance. - A public method `getInitialBalance()` to retrieve the initial balance. - A public method `addBonus(double bonusPer, double amount)` to add a bonus to the `initialBalance` based on a percentage (`bonusPer`) and an additional fixed amount (`amount`). ```java public class Store { public static void main(String[] args) { CashRegister cr = new CashRegister(); cr.setInitialBalance(100); cr.addBonus(0.2, 10); double finalAmount = cr.getInitialBalance(); } } ``` The `Store` class contains the `main` method that: 1. Creates an instance of `CashRegister` named `cr`. 2. Sets the initial balance of `cr` to 100 using `setInitialBalance`. 3. Adds a bonus with `bonusPer` of 0.2 and an additional amount of 10 using `addBonus`. 4. Retrieves the final balance using `getInitialBalance` and stores it in `finalAmount`. **Calculation of `finalAmount` step-by-step:** 1. **Initial balance** is set to 100. 2. **Bonus calculation** in `addBonus` method: - `initialBalance * bonusPer = 100 * 0.2 = 20` - `initialBalance += 20 + 10` - `initialBalance = 100 + 20 + 10 = 130` Therefore, the value of `finalAmount` after executing the code is: **Final Amount: 130.0
Transcribed Image Text:### Question 7 **Problem Statement:** What is the value of `finalAmount` after executing the following code? (Assume each class is defined in a separate java file). **Code Explanation:** ```java public class CashRegister { private String cashierName; private double initialBalance; private String transactionNum; public void setInitialBalance(double inBalance) { initialBalance = inBalance; } public double getInitialBalance() { return initialBalance; } public void addBonus(double bonusPer, double amount) { initialBalance += initialBalance * bonusPer + amount; } } ``` The `CashRegister` class contains: - Three private instance variables: `cashierName`, `initialBalance`, and `transactionNum`. - A public method `setInitialBalance(double inBalance)` to set the initial balance. - A public method `getInitialBalance()` to retrieve the initial balance. - A public method `addBonus(double bonusPer, double amount)` to add a bonus to the `initialBalance` based on a percentage (`bonusPer`) and an additional fixed amount (`amount`). ```java public class Store { public static void main(String[] args) { CashRegister cr = new CashRegister(); cr.setInitialBalance(100); cr.addBonus(0.2, 10); double finalAmount = cr.getInitialBalance(); } } ``` The `Store` class contains the `main` method that: 1. Creates an instance of `CashRegister` named `cr`. 2. Sets the initial balance of `cr` to 100 using `setInitialBalance`. 3. Adds a bonus with `bonusPer` of 0.2 and an additional amount of 10 using `addBonus`. 4. Retrieves the final balance using `getInitialBalance` and stores it in `finalAmount`. **Calculation of `finalAmount` step-by-step:** 1. **Initial balance** is set to 100. 2. **Bonus calculation** in `addBonus` method: - `initialBalance * bonusPer = 100 * 0.2 = 20` - `initialBalance += 20 + 10` - `initialBalance = 100 + 20 + 10 = 130` Therefore, the value of `finalAmount` after executing the code is: **Final Amount: 130.0
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