Here you can find the source of centrePositionOnScreen(Window window)
public static void centrePositionOnScreen(Window window)
//package com.java2s; /* // w w w .j a v a 2 s.c o m * This file is part of the PDF Split And Merge source code * Created on 01/feb/2013 * Copyright 2013 by Andrea Vacondio (andrea.vacondio@gmail.com). * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero 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 Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.awt.Dimension; import java.awt.Toolkit; import java.awt.Window; public class Main { public static void centrePositionOnScreen(Window window) { Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); Dimension frameSize = window.getSize(); window.setLocation(screenSize.width - frameSize.width >> 1, screenSize.height - frameSize.height >> 1); } }