ConsumerDemo.java

public class ConsumerDemo {

    static class Point {
        Double x, y;

        public Point(Double x, Double y) {
            this.x = x;
            this.y = y;
        }
    }

    public static void main(String... args) {
        Point point = new Point(1.0, 2.0);

        Consumer<Point> pointPrinter1 = (p) -> System.out.printf("x = %f, y = %f\n", p.x, p.y);
        Consumer<Point> pointPrinter2 = (p) -> System.out.printf("(%f, %f)\n", p.x, p.y);

        pointPrinter1.accept(point);
        pointPrinter2.accept(point);
    }
}