public class Run {
public static void main(String[] args) {
JFrame f = new JFrame( "球" );
f.setBounds( 700, 200,800,600);
/*******************************************************************/
JavaF ba = new JavaF();
/**********************************************************************/
f.add( ba );
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setLayout(null);
f.setVisible( true );
}
}
class JavaF extends JPanel{
public void painds(Graphics g){
super.paint( g );
g.fillOval( 10,10,30,30 );
g.setColor( Color.BLACK );
}
}