/*
* Copyright (c) 1996, 2000, 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
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*/
package java.lang;
/**
* Signals that an unexpected exception has occurred in a static initializer.
* An <code>ExceptionInInitializerError</code> is thrown to indicate that an
* exception occurred during evaluation of a static initializer or the
* initializer for a static variable.
*
* <p>As of release 1.4, this exception has been retrofitted to conform to
* the general purpose exception-chaining mechanism. The "saved throwable
* object" that may be provided at construction time and accessed via
* the {@link #getException()} method is now known as the <i>cause</i>,
* and may be accessed via the {@link Throwable#getCause()} method, as well
* as the aforementioned "legacy method."
*
* @author Frank Yellin
* @since JDK1.1
*/
public class ExceptionInInitializerError extends LinkageError {
/**
* Use serialVersionUID from JDK 1.1.X for interoperability
*/
private static final long serialVersionUID = 1521711792217232256L;
/**
* This field holds the exception if the
* ExceptionInInitializerError(Throwable thrown) constructor was
* used to instantiate the object
*
* @serial
*
*/
private Throwable exception;
/**
* Constructs an <code>ExceptionInInitializerError</code> with
* <code>null</code> as its detail message string and with no saved
* throwable object.
* A detail message is a String that describes this particular exception.
*/
public ExceptionInInitializerError() {
initCause(null); // Disallow subsequent initCause
}
/**
* Constructs a new <code>ExceptionInInitializerError</code> class by
* saving a reference to the <code>Throwable</code> object thrown for
* later retrieval by the {@link #getException()} method. The detail
* message string is set to <code>null</code>.
*
* @param thrown The exception thrown
*/
public ExceptionInInitializerError(Throwable thrown) {
initCause(null); // Disallow subsequent initCause
this.exception = thrown;
}
/**
* Constructs an ExceptionInInitializerError with the specified detail
* message string. A detail message is a String that describes this
* particular exception. The detail message string is saved for later
* retrieval by the {@link Throwable#getMessage()} method. There is no
* saved throwable object.
*
*
* @param s the detail message
*/
public ExceptionInInitializerError(String s) {
super(s);
initCause(null); // Disallow subsequent initCause
}
/**
* Returns the exception that occurred during a static initialization that
* caused this error to be created.
*
* <p>This method predates the general-purpose exception chaining facility.
* The {@link Throwable#getCause()} method is now the preferred means of
* obtaining this information.
*
* @return the saved throwable object of this
* <code>ExceptionInInitializerError</code>, or <code>null</code>
* if this <code>ExceptionInInitializerError</code> has no saved
* throwable object.
*/
public Throwable getException() {
return exception;
}
/**
* Returns the cause of this error (the exception that occurred
* during a static initialization that caused this error to be created).
*
* @return the cause of this error or <code>null</code> if the
* cause is nonexistent or unknown.
* @since 1.4
*/
public Throwable getCause() {
return exception;
}
}