import java.awt.GridLayout;

import javax.swing.JButton;
import javax.swing.JFrame;

public class MainWindow extends JFrame {
    JButton button1 = new JButton("gomb1");
    JButton button2 = new JButton("gomb2");
    JButton button3 = new JButton("gomb3");
    JButton button4 = new JButton("gomb4");
    JButton button5 = new JButton("gomb5");
    JButton button6 = new JButton("gomb6");
    JButton button7 = new JButton("gomb7");    

    public MainWindow() {
        this.setLayout(new GridLayout(4, 2));
        this.add(button1);
        this.add(button2);
        this.add(button3);
        this.add(button4);
        this.add(button5);
        this.add(button6);
        this.add(button7);

        this.setTitle("GridLayout");
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.pack();
        this.setVisible(true);
    }
}