Main.java

package me.joeychor.test;

import java.util.function.Supplier;

/**
 * Created by joeychor on 11/16/2015.
 */
public class Main {

    @FunctionalInterface
    interface iSaY {
        Supplier<Runnable> say();
    }

    public static void main(String[] args) {

        class haveToDoThis implements Runnable {
            private Object whAttoSAy;
            haveToDoThis(Object o) {
                whAttoSAy = o;
            }
            public void run() {
                System.out.println(whAttoSAy);
            }
        }
        class helloWoRLd extends haveToDoThis {
            helloWoRLd() {
                super("Hello, world!");
            }
        }
        iSaY r = () -> helloWoRLd::new;
        r.say().get().run();
    }
}