Here you can find the source of setCenterPosition(final Frame frame)
public static void setCenterPosition(final Frame frame)
//package com.java2s; /******************************************************************************* * * Copyright (C) 2015-2016//w w w .jav a 2 s . c om * * 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.Frame; public class Main { /** * Set the position of the frame to the center of the screen * */ public static void setCenterPosition(final Frame frame) { final Dimension paneSize = frame.getSize(); final Dimension screenSize = frame.getToolkit().getScreenSize(); frame.setLocation((screenSize.width - paneSize.width) / 2, (screenSize.height - paneSize.height) / 2); } }