/* grid.java */ import java.awt.*; import corejava.*; public class grid extends CloseableFrame { final static int FRAME_WIDTH = 300; final static int FRAME_HEIGHT = 300; public static void main( String args[] ) { grid f = new grid(); f.resize( FRAME_WIDTH, FRAME_HEIGHT ); f.show(); f.setLayout( new GridLayout(0, 3, 10, 10 ) ); for( int i = 1 ; i <= 9 ; i++ ) { f.add( new Button( "Button #" + i ) ); } } }