Here you can find the source of centerOn(JDialog dialog, Component other)
public static void centerOn(JDialog dialog, Component other)
//package com.java2s; /*/*ww w . j a v a2 s . c om*/ * Copyright (c) 2009 Albert Kurucz. * * This file, Util.java is part of JTStand. * * JTStand is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * JTStand 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with GTStand. If not, see <http://www.gnu.org/licenses/>. */ import java.awt.Component; import java.awt.Rectangle; import javax.swing.JDialog; public class Main { public static void centerOn(JDialog dialog, Component other) { int w = dialog.getWidth(); int h = dialog.getHeight(); Rectangle bounds = other.getBounds(); int bw = bounds.width; int bh = bounds.height; dialog.setLocation(bounds.x + (bw - w) / 2, bounds.y + (bh - h) / 2); } }