Praxis-Beispiel(e) gewünscht

public class TextProcessor {
    private Printer printer = PrinterFactory.createPrinter(PrinterFactory.Type.DEFAULT);

    public void print() {
        printer.print();
    }

    // exchange the printer at runtime
    public void setPrinter(PrinterFactory.Type type) {
        printer = PrinterFactory.createPrinter(type);
    }

    public static void main(String[] args) {
        TextProcessor tp = new TextProcessor();
        // print to the default printer
        tp.print();
        // ask the user to select the printer he'd like to use
        tp.setPrinter(PrinterFactory.Type.PDF);
        tp.print();
        // or maybe the user likes to change his mind
        tp.setPrinter(PrinterFactory.Type.EMAIL);
        tp.print();
    }
}


class PrinterFactory {

    public enum Type {
        LASER, DEFAULT, PDF, EMAIL;
    }

    static Printer createPrinter(PrinterFactory.Type type) {
        return switch (type) {
            case LASER -> new LaserPrinter();
            case DEFAULT -> new DefaultPrinter();
            case PDF -> new PDFPrinter();
            case EMAIL -> new EMailPrinter();
        };
    }
}

interface Printer {
    void print();
}

class PDFPrinter implements Printer {

    @Override
    public void print() {
        System.out.println("Creating a PDF");
    }
}

class EMailPrinter implements Printer {

    @Override
    public void print() {
        System.out.println("Text sent as E-Mail");
    }
}

class DefaultPrinter implements Printer {

    @Override
    public void print() {
        System.out.println("Saving the text to a file");
    }
}

class LaserPrinter implements Printer {

    @Override
    public void print() {
        System.out.println("Printing to LaserJet");
    }
}