Here you can find the source of sizeForScreen(Component component)
public static void sizeForScreen(Component component)
//package com.java2s; /*// ww w .j a v a 2s . c o m * Copyright (C) 2013 Aaron Madlon-Kay <aaron@madlon-kay.com>. * * This library 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 2.1 of the License, or (at your option) any later version. * * This library 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 this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301 USA */ import java.awt.Component; import java.awt.Dimension; import java.awt.Toolkit; public class Main { public static void sizeForScreen(Component component) { Dimension screen = Toolkit.getDefaultToolkit().getScreenSize(); int maxHeight = (int) (screen.height * 0.9); int maxWidth = Math.min(maxHeight, (int) (screen.width * 0.9)); component.setMaximumSize(new Dimension(maxWidth, maxHeight)); component.setPreferredSize(new Dimension(Math.min(800, maxWidth), Math.min(800, maxHeight))); } }