Java tutorial
//package com.java2s; import java.awt.*; public class Main { /** * Zentriert ein Window relativ zu dem Parent-Window * * @param parent * Parent-Window, wenn null, dann wird relativ zu dem Bildschirm * zentriert * @param child * Window das zentrirt werden soll. */ static public void centreWindow(Window parent, Window child) { if (child == null) return; Point parentLocation = null; Dimension parentSize = null; if (parent == null) { parentLocation = new Point(0, 0); parentSize = child.getToolkit().getScreenSize(); } else { parentLocation = parent.getLocationOnScreen(); parentSize = parent.getSize(); } Dimension childSize = child.getSize(); child.setLocation((int) (parentLocation.getX() + parentSize.getWidth() / 2 - childSize.getWidth() / 2), (int) (parentLocation.getY() + parentSize.getHeight() / 2 - childSize.getHeight() / 2)); } }