Reverse of Array List Program plan: Filename: “ArrayListUtil.java” This code snippet creates a class “ArrayListUtil”. In the code, Import the required packages. Define a class “ArrayListUtil”. Declare a method “reverse()” to reverse the elements of array list “a”. Get the length of “a” to a variable “len”. Iterate a “for” loop, Create a variable “temp” and assign element at index “i” to it. Set element at index“len-1-i” to an index “i”. Set “temp” to an index “len-1-i”. Filename: “ReverseTester.java” This code snippet creates a class “ReverseTester”. In the code, Import the required packages. Define a class “ReverseTester”. Define the “main” method. Define an array list “a”. Add elements to array list “a” by calling the method “add()” Call the method “reverse()” of “ArrayListUtil” to reverse elements of array list “a”. Print the elements of “a”. Print the expected values.

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Chapter 18, Problem 19PE

Program Plan Intro

Reverse of Array List

Program plan:

Filename: “ArrayListUtil.java”

This code snippet creates a class “ArrayListUtil”. In the code,

Import the required packages.

Define a class “ArrayListUtil”.

Declare a method “reverse()” to reverse the elements of array list “a”.

Get the length of “a” to a variable “len”.

Iterate a “for” loop,

Create a variable “temp” and assign element at index “i” to it.

Set element at index“len-1-i” to an index “i”.

Set “temp” to an index “len-1-i”.

Filename: “ReverseTester.java”

This code snippet creates a class “ReverseTester”. In the code,

Import the required packages.

Define a class “ReverseTester”.

Define the “main” method.

Define an array list “a”.

Add elements to array list “a” by calling the method “add()”

Call the method “reverse()” of “ArrayListUtil” to reverse elements of array list “a”.

Print the elements of “a”.

Print the expected values.

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