Java tutorial
//package com.java2s; //License from project: Open Source License import java.awt.Dimension; import java.awt.Toolkit; import java.awt.Window; public class Main { /** * Centraliza a janela na tela * @param w janela a ser centralizada */ public static void center(Window w) { Dimension us = w.getSize(), them = Toolkit.getDefaultToolkit().getScreenSize(); int newX = (them.width - us.width) / 2; int newY = (them.height - us.height) / 2; w.setLocation(newX, newY); } }