Gui.java

import java.awt.BorderLayout;
import java.awt.GridLayout;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Gui {
 Gui() {
 JFrame frame = new JFrame();
 JPanel panel = new JPanel();
 panel.setBorder(BorderFactory.createEmptyBorder(500, 500, 500, 500));
 panel.setLayout(new GridLayout());
 frame.add(panel, BorderLayout.CENTER);
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 frame.setTitle("Frame");
 frame.pack();
 frame.setVisible(true);
 }

 public static void main(String[] args) {
 new Gui();
 }
}