package Desktop;
 
import javax.swing.*;
 
public  class Square extends JFrame {
 
    public Square (){
    JLabel im1 = new JLabel(new  ImageIcon("src\\image\\1.png"));
    im1.setSize(30, 30);
    im1.setLocation(0, 0);
    im1.setVisible(true);
    }
}
-----------------------------------------
 
package Desktop;
 
import javax.swing.*;
import java.awt.*;
 
public class Frame extends JFrame{
 
    Dimension deskSize = Toolkit.getDefaultToolkit().getScreenSize();
    int deskWidth = deskSize.width;
    int desHeight = deskSize.height;
 
    public Frame (){
        super("Tetris");
        setBounds((deskWidth - 306) / 2+250, (desHeight - 480) / 2-50, 306, 480);
 
        JPanel tPanel = new JPanel(null);
        tPanel.setBackground(Color.DARK_GRAY);
 
        Square sq = new Square();
        tPanel.add(sq);
 
        setContentPane(tPanel);
 
    }
 
}
 
--------------------------------------------------
 
package Desktop;
 
import Desktop.Frame;
 
import javax.swing.*;
 
 class Main {
    public static void main (String[] args){
 
    Frame Tetris = new Frame();
    Tetris.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Tetris.setResizable(false);
    Tetris.setVisible(true);
 
}
}