public static void main(String[] args) {
    class Test implements Consumer<String> {
            @Ovrride
            public void accept(String value) {
                    System.out.println(value);
            }
    }

    Consumer<String> first =  new Test();

    Consumer<String> second = new Consumer<String>() {
            @Ovrride
            public void accept(String value) {
                    System.out.println(value);
            }
    };

    Consumer<String> third = (String value) -> System.out.println(value);

    Consumer<String> fourth = value -> System.out.println(value);

    Consumer<String> fifth = System.out::println;
}