import javax.swing.*;
import java.awt.*;
class prog {
  public static void main(String[] argv) {
    int i;
    JFrame f=new JFrame("Swing Application");
    Container c=f.getContentPane();
    c.setLayout(new GridLayout(3,2));
    for(i=1;i<7;i++)
      c.add(new JButton(Integer.toString(i)));
    f.pack();
    f.setSize(300,300);
    f.show();
  }
}