On Feb 21, 2011, at 10:55 AM, Ben Evans wrote:
> Hi,
>
> I've noticed some oddities with b130 MethodHandles (this is x64 Ubuntu):
>
> private void foo() {
> System.out.println("Foo!");
> }
The type of MHTest#foo is ()void only if foo is static. Otherwise it is
(MHTest)void.
>
> private void run(String[] args) {
> MethodHandle mh;
> MethodType desc = MethodType.methodType(void.class);
>
> try {
> mh = MethodHandles.lookup().findVirtual(getClass(), "foo",
> desc);
To see what's going on, add this: System.out.println("mh="+mh);
> } catch (NoAccessException e) {
> throw (AssertionError)new AssertionError().initCause(e);
> }
>
> try {
> mh.invokeExact();
> } catch (Throwable e) {
> e.printStackTrace();
> }
> }
>
> Compiling with javac works fine, but on running:
>
> bje@bje-desktop:~/projects/java_scratch/src$ java
> -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles
> -XX:+EnableInvokeDynamic com/db/java7/test/MHTest
> java.dyn.WrongMethodTypeException: ()V cannot be called as ()V
That's a known bug in the error reporter. Working on it...
-- John
> at com.db.java7.test.MHTest.run(MHTest.java:33)
> at com.db.java7.test.MHTest.main(MHTest.java:42)
>
> bje@bje-desktop:~/projects/java_scratch/src$ java -version
> java version "1.7.0-ea"
> Java(TM) SE Runtime Environment (build 1.7.0-ea-b130)
> Java HotSpot(TM) 64-Bit Server VM (build 21.0-b02, mixed mode)
>
> Any ideas?
>
> Thanks,
>
> Ben
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