import javax.swing.*; import java.awt.*; import java.awt.event.*; public class TicTacToeFrame extends JFrame { private JButton square11; public TicTacToeFrame() { super("Tic-Tac-Toe"); setLayout(new GridBagLayout()); GridBagConstraints gbc = new GridBagConstraints(); gbc.fill = GridBagConstraints.HORIZONTAL; square11 = new JButton(""); gbc.fill = GridBagConstraints.HORIZONTAL; gbc.gridx = 1; gbc.gridy = 0; add(square11, gbc); } static public void main(String[] args) { final TicTacToeFrame t = new TicTacToeFrame(); t.pack(); t.setVisible(true); } }