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MethodHandle#invokeExact() invocation example
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
class Base {
int x = 13;
class Derived extends Base {
public long m;
public class TestMH {
public static void main(String[] args) throws Throwable {
MethodHandle mh = MethodHandles.lookup().findGetter(Base.class, "x", int.class);
Derived obj = new Derived();
// mh.invokeExact(obj); => throws WrongMethodTypeException:expected(Base)int but found (Derived)void
// mh.invokeExact((Base) obj); => throws WrongMethodTypeException:expected(Base)int but found (Base)void
int value = (int) mh.invokeExact((Base) obj);
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