import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.FlowLayout;
import java.awt.GraphicsEnvironment;
import java.awt.Point;

class SFrame extends JFrame {
	public void setCenter() {		
		Point center = GraphicsEnvironment.getLocalGraphicsEnvironment().getCenterPoint();
		int x =(int) center.getX() - (this.getWidth()/2);
		int y =(int) center.getY() - (this.getHeight()/2);
		Point windowCenter = new Point(x, y);
		this.setLocation(windowCenter);
	}
}