Here you can find the source of centerDialogIntoFrame(java.awt.Component p_CompToBePositioned, javax.swing.JFrame p_MainFrame)
public static void centerDialogIntoFrame(java.awt.Component p_CompToBePositioned, javax.swing.JFrame p_MainFrame)
//package com.java2s; /*/*ww w . j av a 2 s . c om*/ ArchiveBox Copyright (C) Rob Versluis, Rocrail.net Without an official permission commercial use is not permitted. Forking this project is not permitted. 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 2 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, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ import java.awt.Dimension; public class Main { public static void centerDialogIntoFrame(java.awt.Component p_CompToBePositioned, javax.swing.JFrame p_MainFrame) { Dimension l_size = p_CompToBePositioned.getSize(); // position in the middle of the parent frame. // Care about the parent offset from the upper left corner of the screen. int y = p_MainFrame.getY() + ((p_MainFrame.getHeight() / 2) - (l_size.height / 2)); int x = p_MainFrame.getX() + ((p_MainFrame.getWidth() / 2) - (l_size.width / 2)); p_CompToBePositioned.setLocation(x, y); } }