compile « object reference « Java Class Q&A

1. Illegal Forward reference, Object visibility Issues will compiling    stackoverflow.com

Thanks for taking the time to read. =) The problem I am having is mainly Object visibility. I'm creating objects and attempting to create references to them before they have been initialized ...

2. Assignment of expression - Compile or Runtime phenomenon    stackoverflow.com

I had a doubt,

Any expression assignment operation is a compile time or runtime phenomenon ?
e.g Foo f=new Bar();