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

Your program has a list of professors and their office location and office hours per day of the week. The user will type either a professor’s name or day of the week. If they type a professor’s name, show that professor’s office location and office hours (all days of the week). You don’t have to do a name search, you can require the user type the professor’s name exactly right. If the user types a day of the week, show all professors and office location for professors that have office hours on that day of the week. You don’t really need to use time/date code like we did for the notebook, you can just match the day of week by the word (String) e.g., your data has “Wednesday” so if a user types exactly “Wednesday” it matches. This can all be done with hash maps (and loops / if’s / etc.) using Java

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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