System.console()이 안되나보다.
eclipse에서 console 입력을 받으려면 어떻게 하지_
cmd에서 실행시키고 입력해줘야 하나
해결 방법을 가르쳐주세요.

http://www.eclipsezone.com/eclipse/forums/t93685.rhtml
일부 내용:

System.console() doesn't in Eclipse

At 6:12 PM on Apr 23, 2007, Alex Blewitt wrote:

Java 6 has a new function in System called ' console() ' which according to the JavaDoc:

"Returns the unique Console object associated with the current Java virtual machine, if any."

However, despite there being a console view, which existing Java code can interact with via System.in and System.out, running Java 6 programs in Eclipse neither support nor show signs of wanting to support this new method.

It's already been marked as duplicate already, as bug 122429 , so to save you duplicating that bug you might want to just attach your thoughts/comments/votes there.