import java.awt.GraphicsEnvironment;
import java.awt.Point;
import javax.swing.JFrame;
public class CenteringaWindow {
public static void main(String[] args) {
JFrame aWindow = new JFrame("This is the Window Title");
Point center = GraphicsEnvironment.getLocalGraphicsEnvironment().getCenterPoint();
int windowWidth = 400;
int windowHeight = 150;
// set position and size
aWindow.setBounds(center.x - windowWidth / 2, center.y - windowHeight / 2, windowWidth,
windowHeight);
aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
aWindow.setVisible(true); // Display the window
}
}