Part 2
From the Java Bootcamp Resources, launch Part 2.
Task 0
The loadMovies method is already implemented.
public static void loadMovies(String fileName) throws FileNotFoundException {
// reads input from file...
}
If you want to visualize its runtime, feel free to watch the video solution.
Task 1
This method should return true if the choice is less than 0 or greater than 9.
public static boolean incorrectChoice(int choice) {
// TODO
}
Task 2
This method should return true if the rating is less than 0 or greater than 10.
public static boolean incorrectRating(double rating) {
// TODO
}
Task 3
The method promptForChoice will return the integer they choose.
public static int promptForChoice(Scanner scanner) {
while (true) {
System.out.print("\nPlease choose an integer between 0 - 9: ");
int choice = scanner.nextInt();
return choice; <--------------
}
}
Scenario One: continue the while loop if the user doesn't enter an integer.
public static int promptForChoice(Scanner scanner) {
while (true) {
System.out.print("\nPlease choose an integer between 0 - 9: ");
// 1. Anticipate the user not entering an integer. <--------------
int choice = scanner.nextInt();
return choice;
}
}
Scenario Two: continue the while loop if the user enters an incorrect choice.
public static int promptForChoice(Scanner scanner) {
while (true) {
System.out.print("\nPlease choose an integer between 0 - 9: ");
// 1. Anticipate the user not entering an integer.
int choice = scanner.nextInt();
// 2. Anticipate the choice being incorrect. <--------------
return choice;
}
}
Task 4
The method promptForRating will return the rating they choose.
public static double promptForRating(Scanner scanner, String name) {
while (true) {
System.out.print("\nSet a new rating for " + name + ": ");
double rating = scanner.nextDouble();
return rating; <---------
}
}
Scenario One: continue the while loop if the user doesn't enter a double.
public static double promptForRating(Scanner scanner, String name) {
while (true) {
System.out.print("\nSet a new rating for " + name + ": ");
// 1. Anticipate the user not entering a double. <-------------
double rating = scanner.nextDouble();
return rating;
}
}
Scenario Two: continue the while loop if the user enters an incorrect rating.
public static double promptForRating(Scanner scanner, String name) {
while (true) {
System.out.print("\nSet a new rating for " + name + ": ");
// 1. Anticipate the user not entering a double.
double rating = scanner.nextDouble();
// 2. Anticipate the rating being incorrect. <----------
return rating;
}
}