interface

public interface Printer {
    void print();
}


/***********************************/


public class ColorfulPrinter implements Printer{
    @Override
    public void print() {
        System.out.println("this is colorful printer!!!");
    }
}


/***********************************/


public class BlackWhitePrinter implements Printer{
    @Override
    public void print() {
        System.out.println("this is black white printer!!!");
    }
}

/***********************************/

public class T {


    public static void main(String[] args) {
        Printer cp = new ColorfulPrinter();

        Printer bp = new BlackWhitePrinter();

        Printer ap = new Printer() {
            @Override
            public void print() {
                System.out.println("this is anonymous printer");
            }
        };

        Printer lp = () -> System.out.println("this is anonymous printer");

        cp.print();
        bp.print();
        
        ap.print();
        lp.print();
    }
}