MinifiedLambdaBehavior.java

class MinifiedLambdaBehavior
    static Runnable makeI() { return () -> {}; }

    static Runnable makeII(String s) { return () -> s.equals(""); }

    static Runnable makeIII() { return new Runnable() { public void run() {} }; }

    @Test
    public void thing() {
        Set<Runnable> runnables = new HashSet<>();
        runnables.add(() -> {});
        runnables.add(() -> {});

        runnables.add(makeI());
        runnables.add(makeI());

        String s = "";
        runnables.add(makeII(s));
        runnables.add(makeII(s));

        runnables.add(makeIII());
        runnables.add(makeIII());

        System.out.println("Things created: " + runnables.size());
    }
}

//Outputs:
// Things created: 7