http://www.faqs.org/docs/thinkjava/chap08.htm
[http://www.faqs.org/docs/thinkjava/chap08.htm]이곳의 8.10에 있는 원문입니다.
8.10 null
When you create an object variable, remember that you are creating a reference
to an object. Until you make the variable point to an object, the