Home » openjdk-7 » java » awt » [javadoc | source]

    1   /*
    2    * Copyright (c) 2000, 2004, 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   
   26   package java.awt;
   27   
   28   /**
   29    * Thrown when code that is dependent on a keyboard, display, or mouse
   30    * is called in an environment that does not support a keyboard, display,
   31    * or mouse.
   32    *
   33    * @since 1.4
   34    * @author  Michael Martak
   35    */
   36   public class HeadlessException extends UnsupportedOperationException {
   37       /*
   38        * JDK 1.4 serialVersionUID
   39        */
   40       private static final long serialVersionUID = 167183644944358563L;
   41       public HeadlessException() {}
   42       public HeadlessException(String msg) {
   43           super(msg);
   44       }
   45       public String getMessage() {
   46           String superMessage = super.getMessage();
   47           String headlessMessage = GraphicsEnvironment.getHeadlessMessage();
   48   
   49           if (superMessage == null) {
   50               return headlessMessage;
   51           } else if (headlessMessage == null) {
   52               return superMessage;
   53           } else {
   54               return superMessage + headlessMessage;
   55           }
   56       }
   57   }

Home » openjdk-7 » java » awt » [javadoc | source]