1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 import java.awt.Dimension;
  26 import java.awt.Toolkit;
  27 import javax.swing.BorderFactory;
  28 import javax.swing.JFrame;
  29 import javax.swing.JLabel;
  30 import javax.swing.JPanel;
  31 
  32 public class HelloWorld {
  33 
  34   private static void createAndShowGUI() {
  35     //Create and set up the window.
  36     JFrame frame = new JFrame("Hello World");
  37     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  38 
  39     Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
  40     frame.setBounds(0, 0, dim.width/2, dim.height/2);
  41 
  42     //Add the ubiquitous "Hello World" label.
  43     JLabel label = new JLabel("Hello World");
  44     JPanel panel = new JPanel();
  45     panel.setBorder(BorderFactory.createEmptyBorder(30, 10, 30, 30));
  46     panel.add(label);
  47 
  48     frame.getContentPane().add(panel);
  49 
  50     //Display the window.
  51     frame.setVisible(true);
  52   }
  53 
  54   public static void main(String[] args) {
  55     //Schedule a job for the event-dispatching thread:
  56     //creating and showing this application's GUI.
  57     javax.swing.SwingUtilities.invokeLater(new Runnable() {
  58       public void run() {
  59         createAndShowGUI();
  60       }
  61     });
  62   }
  63 }