Filter that retains all the objects Program plan: In a file “Filter.java”, create an interface “Filter”, Declare the method “accept()”. Define the method “retainAll()”. Initialize the variable. Make loop for objects, Check the condition, Assign the object properties. Increment the value by “1”. Create a loop, Assign the properties of objects accepted by filter. Create a loop, Fill the array that contains other objects, with null value. In a file “Measurer.java”, create an interface “Measurer”, Declare the method “measure()”, In a file “BalanceFilter.java”, create a class “BalanceFilter” that implements “Filter” interface, Define the method “accept()”, Return the balance greater than “1000”. In a file “BalanceMeasurer.java”, create a class “BalanceMeasurer” that implements “Measurer” interface, Define the method “measure()”, Return the value obtained from the method “getBalance()”. In a file “BankAccount.java”, create a class “BankAccount”, Declare the variable. Define the constructor to create a bank account with “0” balance. Define the parameterized constructor to set the specified balance. Define the method “deposit()” to update the balance with the deposited amount. Define the method “withdraw()” to update the balance with withdrawal amount. Define the method “getBalance()” to return the current balance. Define the method “addInterest()”, Add the interest to the bank balance. In a file “Data.java”, create a class “Data”, Define the method “average()”, Initialize the variable. Make the loop for the objects, Check the condition, Update sum value. Increment the value of “number”. Check whether the value is positive, If it is true, return the value obtained by dividing sum by the value “number”. Otherwise, return “0”. In a file “FilterTester.java”, create a class “FilterTester”, Define the method “main()”, Create an array of objects for “BankAccount” class. Call the constructor with “900” as parameter. Call the constructor with “3000” as parameter. Call the constructor with “300” as parameter. Call the constructor with “5000” as parameter. Call the constructor with “1000” as parameter. Create an object for “BalanceMeasure”. Create an object for “BalanceFilter”. Print the value returned from “average()”. Print the expected average value. Call the method “retainAll()”. Print the message string. Create a loop, Check the condition, Print the value returned from the method “getBalance()”. Print the expected values.

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Chapter 10, Problem 8PP

Program Plan Intro

Filter that retains all the objects

Program plan:

In a file “Filter.java”, create an interface “Filter”,

Declare the method “accept()”.

Define the method “retainAll()”.

Initialize the variable.

Make loop for objects,

Check the condition,

Assign the object properties.

Increment the value by “1”.

Create a loop,

Assign the properties of objects accepted by filter.

Create a loop,

Fill the array that contains other objects, with null value.

In a file “Measurer.java”, create an interface “Measurer”,

Declare the method “measure()”,

In a file “BalanceFilter.java”, create a class “BalanceFilter” that implements “Filter” interface,

Define the method “accept()”,

Return the balance greater than “1000”.

In a file “BalanceMeasurer.java”, create a class “BalanceMeasurer” that implements “Measurer” interface,

Define the method “measure()”,

Return the value obtained from the method “getBalance()”.

In a file “BankAccount.java”, create a class “BankAccount”,

Declare the variable.

Define the constructor to create a bank account with “0” balance.

Define the parameterized constructor to set the specified balance.

Define the method “deposit()” to update the balance with the deposited amount.

Define the method “withdraw()” to update the balance with withdrawal amount.

Define the method “getBalance()” to return the current balance.

Define the method “addInterest()”,

Add the interest to the bank balance.

In a file “Data.java”, create a class “Data”,

Define the method “average()”,

Initialize the variable.

Make the loop for the objects,

Check the condition,

Update sum value.

Increment the value of “number”.

Check whether the value is positive,

If it is true, return the value obtained by dividing sum by the value “number”.

Otherwise, return “0”.

In a file “FilterTester.java”, create a class “FilterTester”,

Define the method “main()”,

Create an array of objects for “BankAccount” class.

Call the constructor with “900” as parameter.

Call the constructor with “3000” as parameter.

Call the constructor with “300” as parameter.

Call the constructor with “5000” as parameter.

Call the constructor with “1000” as parameter.

Create an object for “BalanceMeasure”.

Create an object for “BalanceFilter”.

Print the value returned from “average()”.

Print the expected average value.

Call the method “retainAll()”.

Print the message string.

Create a loop,

Check the condition,

Print the value returned from the method “getBalance()”.

Print the expected values.

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