Custom Checked Exception

Lab Java Advanced 30 points

Create class InsufficientFundsException extends Exception. A withdraw method declares throws InsufficientFundsException with message short by X. Start with balance 100, process withdrawals, and print the new balance or failed: MESSAGE.

Input

n, then n amounts.

Output

n lines.

Example

Input

Output

70
failed: short by 20
0

Sample input available Sample output available

Editor

Java

Hints

Checked exceptions (extending Exception) must be declared with throws or caught.

RuntimeException subclasses are unchecked.

Solution explanation

Checked exceptions force callers to deal with recoverable failures; the compiler won't let them forget.

Show solution

import java.util.Scanner;

class InsufficientFundsException extends Exception {
    InsufficientFundsException(String message) {
        super(message);
    }
}

public class Main {
    static int balance;

    static void withdraw(int amount) throws InsufficientFundsException {
        if (amount > balance) {
            throw new InsufficientFundsException("short by " + (amount - balance));
        }
        balance -= amount;
    }

    public static void main(String[] args) {
        balance = 100;
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        for (int i = 0; i < n; i++) {
            try {
                withdraw(sc.nextInt());
                System.out.println(balance);
            } catch (InsufficientFundsException e) {
                System.out.println("failed: " + e.getMessage());
            }
        }
    }
}

Output

Answer