import java.awt.BorderLayout;

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");

    public MainWindow() {
        this.setLayout(new BorderLayout());
        this.add(button1, BorderLayout.NORTH);
        this.add(button2, BorderLayout.EAST);
        this.add(button3, BorderLayout.SOUTH);
        this.add(button4, BorderLayout.WEST);
        this.add(button5, BorderLayout.CENTER);

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