import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Main {
public static void main(String[] args) {
JFrame frame = new JFrame();
JPanel panel = new JPanel(new GridLayout(10, 10, 10, 10));
for (int i = 0; i < 100; i++) {
panel.add(new JButton(String.valueOf(i)));
}
frame.add(panel);
frame.setSize(600, 600);
frame.setVisible(true);
}
}