Using Objects and Methods unit test

Dot operator

Random integer in a range

double

Primitive vs reference types

substring(a, b)

Autoboxing and unboxing

boolean

Math.random

Passing a reference to a method

void method

Instantiation

null

METHODS AND CONTROL STRUCTURES (Question 1, 9 points). A parking garage is represented by the ParkingGarage class, which provides two helper methods: int spacesAvailable(int level) returns the number of empty spaces (always ≥ 0) on the given level, and void reserve(int level, int count) decreases the number of empty spaces on that level by count (> 0). A valet is represented by the Valet class, with private instance variables int maxCars (the most cars the valet can park on one level, > 0) and ParkingGarage garage. You will write two Valet methods. public int parkOnLevel(int level) — the valet parks as many cars as the level has empty spaces, capped at maxCars; the method must call reserve to claim those spaces and returns the number of cars parked. (For example, with maxCars 5: 12 spaces available → park 5; 3 spaces available → park 3; 0 spaces available → park 0.) public double sweep(int startLevel, int endLevel) — parks cars on every level from startLevel to endLevel inclusive and returns the total fee earned. Each level pays $4.00 per car parked, plus a $2.00 surcharge for that level if the valet parked maxCars cars on it OR the level number is 1 or 2. (Example: with maxCars 3 and levels 1–4 yielding 3, 2, 2, 3 cars parked, the fee is (12 + 2) + (8 + 2) + 8 + (12 + 2) = $46.00.) Assume parkOnLevel works as specified; you must use it appropriately.