Java tutorial
/* This program is a part of the companion code for Core Java 8th ed. (http://horstmann.com/corejava) This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.awt.EventQueue; import javax.swing.JFrame; /** * @version 1.32 2007-06-12 * @author Cay Horstmann */ public class SimpleFrameTest { public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { SimpleFrame frame = new SimpleFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } }); } } class SimpleFrame extends JFrame { public SimpleFrame() { setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT); } public static final int DEFAULT_WIDTH = 300; public static final int DEFAULT_HEIGHT = 200; }