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jeremybenn |
/* ClassNotFoundException.java -- thrown when class definition cannot be found
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Copyright (C) 1998, 2002, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.lang;
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/**
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* Thrown when a class is requested by reflection, but the class definition
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* cannot be found. This exception is often chained from another Throwable.
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*
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* @author Brian Jones
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* @author Eric Blake (ebb9@email.byu.edu)
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* @see Class#forName(String)
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* @see ClassLoader#findSystemClass(String)
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* @see ClassLoader#loadClass(String, boolean)
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* @status updated to 1.4
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*/
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public class ClassNotFoundException extends Exception
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{
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/**
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* Compatible with JDK 1.0+.
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*/
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private static final long serialVersionUID = 9176873029745254542L;
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/**
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* The cause of this exception (duplicates the one stored in Throwable).
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*
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* @serial the exception cause
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* @since 1.2
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*/
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private final Throwable ex;
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/**
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* Create an exception without a message. Note that this initializes the
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* cause to null.
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*/
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public ClassNotFoundException()
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{
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this(null);
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}
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/**
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* Create an exception with a message. Note that this initializes the
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* cause to null.
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*
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* @param s the message
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*/
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public ClassNotFoundException(String s)
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{
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super(s);
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ex = null;
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}
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/**
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* Create an exception with a message and chain it to the exception
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* which occurred while loading the class.
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*
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* @param s the message
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* @param ex the chained exception
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* @since 1.2
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*/
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public ClassNotFoundException(String s, Throwable ex)
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{
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super(s, ex);
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this.ex = ex;
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}
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/**
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* Returns the exception which occurred while loading the class,
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* otherwise returns null. This is a legacy method; the preferred choice
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* now is {@link Throwable#getCause()}.
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*
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* @return the cause of this exception
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* @since 1.2
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*/
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public Throwable getException()
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{
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return ex;
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}
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/**
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* Returns the exception which occurred while loading the class,
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* otherwise returns null.
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*
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* @return the cause of this exception
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* @since 1.4
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*/
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public Throwable getCause()
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{
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return ex;
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}
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}
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