/*
* Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.awt;
/** {@collect.stats}
* Thrown when code that is dependent on a keyboard, display, or mouse
* is called in an environment that does not support a keyboard, display,
* or mouse.
*
* @since 1.4
* @author Michael Martak
*/
public class HeadlessException extends UnsupportedOperationException {
/*
* JDK 1.4 serialVersionUID
*/
private static final long serialVersionUID = 167183644944358563L;
public HeadlessException() {}
public HeadlessException(String msg) {
super(msg);
}
public String getMessage() {
String superMessage = super.getMessage();
String headlessMessage = GraphicsEnvironment.getHeadlessMessage();
if (superMessage == null) {
return headlessMessage;
} else if (headlessMessage == null) {
return superMessage;
} else {
return superMessage + headlessMessage;
}
}
}