doPrivileged with lambda

[Weijun Wang]

So we have been writing

    x = AccessController.doPrivileged(
            new PrivilegedAction<Object>() {
                public Object run() {
                    return some();
                }
            }
    );
Using jdk8 lambda, it seems we can write

    x = AccessController.doPrivileged(() -> some());

But it does not compile, because () -> some() matches both 
PrivilegedAction and PrivilegedExceptionAction. So it has to be

    x = AccessController.doPrivileged(
            (PrivilegedAction<Object>)(() -> some()));

which is cumbersome again.

I'm not requesting for any new API at the moment, just talking about my 
frustration.

-Max