Java tutorial
//package com.java2s; /* Storybook: Scene-based software for novelists and authors. Copyright (C) 2008 - 2012 Martin Mustun 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 javax.swing.JFrame; import javax.swing.WindowConstants; public class Main { public static void showFrame(JFrame frame, JFrame parent) { frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE); frame.pack(); frame.setLocation(parent.getX() + (parent.getWidth() - frame.getWidth()) / 2, parent.getY() + (parent.getHeight() - frame.getHeight()) / 2); frame.setVisible(true); } }