introductionToProgramming/week13/Printer.java

package week13;

import common.StdRandom;

public class Printer {
    static class OutOfPaperException extends Exception {
        @Override
        public String getMessage() {
            return "No Paper pack found in printer.\n" +
            "Check that there's enough paper left for this print job, that the Paper pack is clean and that the paper pack chip is undamaged. "+
            "Please note that third-party Paper packs may not be supported. Check that the Paper pack is made for this model.";
        }
    }
    static class OutOfTonerException extends Exception {
        @Override
        public String getMessage() {
            return "Printing supply pack is empty or was not found.\n" +
            "Check that an official Printing supply pack is correctly inserted in the printer, try re-seating if necessary. " +
            "Check that Printing supply packs are inserted into the correct color coded slots. Check that your Printing resupply subscription is active. " +
            "Please note that third-party Printing supply packs may not be supported. Check that the Paper pack is made for this model.";
        }
    }
    static class PaperJamException extends Exception {
        @Override
        public String getMessage() {
            return "lp0 on fire.";
        }
    }

    private static Exception getExceptionFromErrorCode(int errorCode) {
        return switch(errorCode / 10) {
            case 0 -> new OutOfPaperException();
            case 1 -> new OutOfTonerException();
            case 2 -> new PaperJamException();
            default -> throw new IllegalArgumentException();
        };
    }

    public static void print() throws Exception {
        var rnd = StdRandom.uniformInt(30);
        var exception = getExceptionFromErrorCode(rnd);
        throw exception;
    }

    public static void main(String[] args) {
        try {
            print();
            System.out.println("Printed successfully, thanks for your patronage.");
        } catch(Exception e) {
            System.err.println(e.getMessage());
        }
    }
}