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

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GridLayout;

public class Grid {
    public static void main(String[] args) {
        JFrame vindu = new JFrame("Grid");
        JPanel panel = new JPanel();
        vindu.add(panel);
        vindu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        panel.setLayout(new GridLayout(2, 3));

        JButton knapp1 = new JButton("Knapp1");
        knapp1.setForeground(Color.RED);

        JButton knapp2 = new JButton("Knapp2");
        knapp2.setBackground(new Color(0, 0, 255));
        knapp2.setForeground(Color.GREEN);

        JButton knapp3 = new JButton("Knapp3");
        knapp3.setFont(new Font(Font.MONOSPACED, Font.BOLD, 30));

        JButton knapp4 = new JButton("Knapp4");
        JButton knapp5 = new JButton("Knapp5");
        JButton knapp6 = new JButton("Knapp6");
        JButton knapp7 = new JButton("Knapp7");

        panel.add(knapp1);
        panel.add(knapp2);
        panel.add(knapp3);
        panel.add(knapp4);
        panel.add(knapp5);
        panel.add(knapp6);
        panel.add(knapp7);

        vindu.pack();
        vindu.setLocationRelativeTo(null);
        vindu.setVisible(true);
    }

}