public void setCenter(javax.swing.JFrame window) {
	java.awt.Point center = 
	java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment().getCenterPoint();
	int x =(int) center.getX() - (this.getWidth()/2);
	int y =(int) center.getY() - (this.getHeight()/2);
	java.awt.Point windowCenter = new java.awt.Point(x, y);
	window.setLocation(windowCenter);
}