Java tutorial
//package com.java2s; /* * utils - SwingUtils.java - Copyright 2010 David Roden * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.awt.Point; import java.awt.Rectangle; import java.awt.Window; public class Main { /** * {@link Window#pack() Packs} the given window and positions it so that its * center stays the same. * * @param window * The window to pack and recenter */ public static void repackCentered(Window window) { Point center = getCenter(window.getBounds()); window.pack(); window.setLocation((center.x - window.getWidth() / 2), (center.y - window.getHeight() / 2)); window.repaint(); } /** * Returns the center of the given rectangle. * * @param bounds * The rectangle which center to get * @return The center of the rectangle */ private static Point getCenter(Rectangle bounds) { return new Point(bounds.x + bounds.width / 2, bounds.y + bounds.height / 2); } }