More Library Puzzlers - Java Puzzlers: Traps, Pitfalls, and Corner Cases - page 236

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Puzzle 78: Reflection Infection
This puzzle illustrates a simple application of reflection. What does this program print?
import java.util.*;
import java.lang.reflect.*;
public class Reflector {
public static void main(String[] args) throws Exception {
Set<String> s = new HashSet<String>();
s.add("foo");
Iterator it = s.iterator();
Method m = it.getClass().getMethod("hasNext");
System.out.println(m.invoke(it));
}
}