Java awt구조

- java.awt 구조
                Component(setSize(),setVisable())
         |                      |                        |
    Button            TextArea          Container(abstracts)
                                                  |             |
                                              Panel     window(abstracts)
                                                  |             |
                                               Frame      Dialog
                                                                |
                                                            File Dialog

- GUI를 선언할때는 default로 선언하면 된다.

- BorderLayout의 특정 영역에 들어가는 것은 size를 주어도 크기를 정하지 못한다.