Classy Puzzlers - Java Puzzlers: Traps, Pitfalls, and Corner Cases - page 153

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Puzzle 54: Null and Void

Here is yet another variant on the classic Hello World program. What does this one do?

public class Null {

public static void greet() {

System.out.println("Hello world!");

}

public static void main(String[] args) {

((Null) null).greet();

}

}

Solution 54: Null and Void