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/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package java.lang;

/**
 * Thrown when a class loader is unable to find a class.
 */
public class ClassNotFoundException extends ReflectiveOperationException {

    private static final long serialVersionUID = 9176873029745254542L;

    private Throwable ex;

    /**
     * Constructs a new {@code ClassNotFoundException} that includes the current
     * stack trace.
     */
    public ClassNotFoundException() {
        super((Throwable) null);
    }

    /**
     * Constructs a new {@code ClassNotFoundException} with the current stack
     * trace and the specified detail message.
     *
     * @param detailMessage
     *            the detail message for this exception.
     */
    public ClassNotFoundException(String detailMessage) {
        super(detailMessage, null);
    }

    /**
     * Constructs a new {@code ClassNotFoundException} with the current stack
     * trace, the specified detail message and the exception that occurred when
     * loading the class.
     *
     * @param detailMessage
     *            the detail message for this exception.
     * @param exception
     *            the exception which occurred while loading the class.
     */
    public ClassNotFoundException(String detailMessage, Throwable exception) {
        super(detailMessage);
        ex = exception;
    }

    /**
     * Returns the exception which occurred when loading the class.
     *
     * @return Throwable the exception which occurred while loading the class.
     */
    public Throwable getException() {
        return ex;
    }

    /**
     * Returns the cause of this Throwable, or {@code null} if there is no
     * cause.
     *
     * @return Throwable the receiver's cause.
     */
    @Override
    public Throwable getCause() {
        return ex;
    }
}




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