Here you can find the source of getCenterOfTheWindow(JFrame frame)
public static Rectangle getCenterOfTheWindow(JFrame frame)
//package com.java2s; /******************************************************************************* * Copyright 2010 Sudhir Movva/* w w w. ja va 2 s . com*/ * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. ******************************************************************************/ import java.awt.Dimension; import java.awt.Rectangle; import javax.swing.JFrame; public class Main { public static Rectangle getCenterOfTheWindow(JFrame frame) { Dimension d = frame.getSize(); double x = d.getWidth() / 2.0 - 150; double y = d.getHeight() / 2.0 - 50; Rectangle r = new Rectangle((int) x, (int) y, 0, 0); return r; } }