시소당

GridBagLayout, GridBagConstraints

fill

기  본적으로,  컴포넌트의  크기는  셀의  크기와  상관없이  컴포넌트의  적절한  또는  최소  크기로  설정된다.    하지만  컴포넌트가  수평,  수직  또는  둘다  표시  가능한  영ㅇ역을  채우기  위해서  컴포넌트를  늘이도록  지시하는  fill  제약조건을  사용할  수  있다.

GridBagConstraints안에는  fill값을  설정하는  데  사용되는  네  개의  상수가  정의되어  있다.
·  HORIZONTAL
    컴포넌트를  수평으로  확장
·  VERTICAL
    컴포넌트를  수직으로  확장
·  BOTH
    표시영역을  채우기  위해서  컴포넌트를  수평과  수직  양쪽  모두  확장
·  NONE
    컴포넌트가  원래의(적절한  또는  최소)  크기로  있게  한다.(기본값)
ex)  

public  class  Test  {

  

              public  static  void  main(String[]  args)  {

                        

                          JFrame  f  =  new  JFrame("GridBagLayout  Testing");

                        

                          f.setLayout(new  GridBagLayout());

                          GridBagConstraints  gbc  =  new  GridBagConstraints();

                          Container  pane  =  f.getContentPane();

                        

                          gbc.gridy  =  0;

                          gbc.gridx  =  GridBagConstraints.RELATIVE;

                          pane.add(new  JButton("This  button's  preferred

                                width  is  large  because  its  text  is  long"),gbc);

                                      

                          gbc.gridy  =  1;

                          pane.add(new  JButton("2nd"),gbc);

  

                        

                          gbc.gridy  =  2;

                          gbc.fill  =  GridBagConstraints.HORIZONTAL;

                          pane.add(new  JButton("5th"),gbc);

  

                          f.setBounds(0,0,400,300);

                          f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                          f.setVisible(true);

              }

}

[출처]  GridBagLayout,  GridBagConstraints|작성자  가온
http://blog.naver.com/kimwj304?Redirect=Log&logNo=50021438674