AP Computer Science A FRQ: Library System

A public library keeps track of the books that it owns. Each book has a title, an author, a year of publication, and a number of times it has been borrowed.

You will design several classes to help manage the books in the library. You may assume that no two books have the exact same title and author combination.

Part A – The Book Class

• Instance variables: title, author, year, timesBorrowed
• Constructor that sets title, author, year, and sets timesBorrowed to 0
• Getter methods for all fields
• borrowBook() method that increments timesBorrowed
• toString() returns: "Title by Author (Year), Borrowed X times"

Part B – The Library Class

• Private ArrayList<Book> collection
• addBook(Book b) adds a book
• getMostBorrowed() returns book with highest borrow count
• findBooksByAuthor(String author) returns all books by that author
• borrow(String title, String author) finds and borrows a book

Part C – Borrow Statistics

Add getBorrowStats() method to Library:

Map<String, Integer> getBorrowStats()

Returns total times borrowed per author.

Part D – Sorting by Popularity

Write printBooksByPopularity() that prints all books in descending borrow count using toString().

You may use a custom Comparator or implement Comparable.

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AP Computer Science A FRQ: Student Grades System

A school system tracks students and their grades. Each student has a name, a list of test scores, and a method for calculating their average.

Part A – The Student Class

• Instance variables: name (String), scores (ArrayList<Integer>)
• Constructor to initialize name and empty scores list
• addScore(int score) adds a score
• getAverage() returns the average score
• toString() returns "Name: [scores], Average: avg"

Part B – The Gradebook Class

• Instance variable: ArrayList<Student>
• addStudent(Student s) adds a student
• getTopStudent() returns student with highest average
• getClassAverage() returns overall average score of all students
• findStudent(String name) returns the Student object with the given name

Part C – Grade Report

Add a method printGradeReport() to Gradebook that prints each student's name, scores, and average in a formatted report.