Activity Objectives:

At the end of this activity, you should be able to:

$$ define classes and methods

$$ implement polymorphism and inheritance

$$ instantiate an object array

$$ apply Exception to all input validations

$$ create a Java application for multiple users

What to Prepare for the Activity:

$$ NetBeans IDE $12\mathrm{.}0$ or higher version

$$ JDK$10($Java Development Kit $10)$ or higher version

Procedure:

$$ Create a NetBeans project for this activity. The project name should be as follows:

Project Name: CS$6203\_$JavaCredit$\_$

Example: CS$6203\_$JavaCredit$\_$Blanco$\_$Maria

$$ The class names to be created are the following:

o Client $($the main class that contains the main method and the implementation of the main menu$)$

o Credit $($the class where attributes and methods are defined$)$

$$ All class names must be suffixed with your last name.

o Client Ex$.$ ClientBlanco

o Credit Ex$.$ CreditBlanco

$$ Note that the object to be instantiated in the main method is an object array.

For example: CreditBlanco $[]$ cb $=$ new CreditBlanco $[100]$;

$$ Only NetBeans project will be accepted.

Java Credit Main Menu

$[1]$ New Credit Account

$[2]$ Credit Inquiry

$[3]$ Purchases

$[4]$ Payment

$[5]$ Close Credit Account

$[7]$ Exit

Program Specifications:

$1.$ New Credit Account

$$ Input the name of the client.

$$ Input the annual income and assign the credit limit as follows:

Annual Income Credit Limit

$200,000$ and above but not greater than $300,00030,000$

$300,000$ and above but not greater than $500,00050,000$

$500,000$ and above $100,000$

$$ Generate and display a random four$-$digit credit account number.

$$ Display also the credit limit$.$ The credit limit is the maximum amount of credit.

$$ An annual income below $200,000$ is not eligible for the credit.

$2.$ Credit Inquiry

$$ Input the credit account number and validate.

$$ If the credit account number is valid, display the credit account number, credit account name, credit limit and credit balance.

$$ The credit balance is the outstanding balance or the total amount due.

$3.$ Purchases

$$ Input the credit account number and validate.

$$ If the credit account number is valid, input the amount of purchases of not less than Php $1$ and not greater than the credit limit and the allowable purchase amount.

$$ Compute and update the credit balance and allowable purchase amount as follows:

Credit balance$+=$amount of purchases

Interest$=3\%$ of credit balance

Credit balance$+=$interest

Allowable purchase amount $=$ credit limit $$ credit balance

$$ The allowable purchase amount is the difference between the credit limit and the credit balance. The credit balance should not exceed the credit limit$.$

$4.$ Payment

$$ Input the credit account number and validate.

$$ If the credit account number is valid, input the amount of payment of not less than Php $1$ and not greater than the credit balance.

$$ Compute and update the credit balance as follows:

Credit balance $=$ amount of payment

$5.$ Close Credit Account

$$ Input the credit account number and validate.

$$ If the credit account number is valid, confirm if the user wants to close the account.

$$ If confirmed by the user, he should be required to pay all the credit balance before closing the account.

$$ Otherwise, go back to the main menu.

$$ If the account has been closed, the credit account should not exist anymore.

$6.$ Exit