Display student class details “HashMap” and “ArrayList” Program Plan: Import required package. Define “StudentIDsListTest” class. Define main function. Create hashmap for student ID and course number. Create an object for scanner class. Declare required variables. Display prompt statement. Performs “do-while” loop. This loop will execute until “studID” is not equal to “-1”. Read student ID from user. If student ID is not equal to “-1”, then read course number from user. If the student ID is contains in “students” list, then Create array list named “class_List”. Add the course number to “class_List” using “add” method. Map the student ID to course number using “put” method. Otherwise, Create array list named “class_List”. If the course number is not in the class list, then add the given course number to “class_List” using “add” method. Display all the classes for each student using “for” loop. Create array list named “stud_List”. Display course number for corresponding student ID.

Question

Programming in C#: Write a console-based application that displays every perfect number from 1 through 10000. A number is perfect if it equals the sum of all the smaller positive integers that divide evenly into it. For example, 6 is perfect because 1, 2, and 3 divide evenly into it and their sum is 6. Use format strings(field size 8, right alignment) to show all perfect numbers. Display the results as seen below. 6 28 496 8128

Answer 1

Question

Chapter 12, Problem 15PP

Program Plan Intro

Display student class details “HashMap” and “ArrayList”

Program Plan:

Import required package.

Define “StudentIDsListTest” class.

Define main function.

Create hashmap for student ID and course number.

Create an object for scanner class.

Declare required variables.

Display prompt statement.

Performs “do-while” loop. This loop will execute until “studID” is not equal to “-1”.

Read student ID from user.

If student ID is not equal to “-1”, then read course number from user.

If the student ID is contains in “students” list, then

Create array list named “class_List”.

Add the course number to “class_List” using “add” method.

Map the student ID to course number using “put” method.

Otherwise,

Create array list named “class_List”.

If the course number is not in the class list, then add the given course number to “class_List” using “add” method.

Display all the classes for each student using “for” loop.

Create array list named “stud_List”.

Display course number for corresponding student ID.

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