Discussion
Which of these is the correct way to write a Runnable as a lambda?
Answer: C
Correct answer: Runnable r = () -> System.out.println("go");
A lambda for Runnable takes no parameters and returns nothing, so it is an empty parameter list, the arrow token, and a statement. The arrow is -> and not =>; no return type is written; and adding a parameter would not match run(), which takes none.
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