8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.base/share/classes/java/util/ConcurrentModificationException.java

@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 1997, 2013, 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.util;
+
+/**
+ * This exception may be thrown by methods that have detected concurrent
+ * modification of an object when such modification is not permissible.
+ * <p>
+ * For example, it is not generally permissible for one thread to modify a Collection
+ * while another thread is iterating over it.  In general, the results of the
+ * iteration are undefined under these circumstances.  Some Iterator
+ * implementations (including those of all the general purpose collection implementations
+ * provided by the JRE) may choose to throw this exception if this behavior is
+ * detected.  Iterators that do this are known as <i>fail-fast</i> iterators,
+ * as they fail quickly and cleanly, rather that risking arbitrary,
+ * non-deterministic behavior at an undetermined time in the future.
+ * <p>
+ * Note that this exception does not always indicate that an object has
+ * been concurrently modified by a <i>different</i> thread.  If a single
+ * thread issues a sequence of method invocations that violates the
+ * contract of an object, the object may throw this exception.  For
+ * example, if a thread modifies a collection directly while it is
+ * iterating over the collection with a fail-fast iterator, the iterator
+ * will throw this exception.
+ *
+ * <p>Note that fail-fast behavior cannot be guaranteed as it is, generally
+ * speaking, impossible to make any hard guarantees in the presence of
+ * unsynchronized concurrent modification.  Fail-fast operations
+ * throw {@code ConcurrentModificationException} on a best-effort basis.
+ * Therefore, it would be wrong to write a program that depended on this
+ * exception for its correctness: <i>{@code ConcurrentModificationException}
+ * should be used only to detect bugs.</i>
+ *
+ * @author  Josh Bloch
+ * @see     Collection
+ * @see     Iterator
+ * @see     Spliterator
+ * @see     ListIterator
+ * @see     Vector
+ * @see     LinkedList
+ * @see     HashSet
+ * @see     Hashtable
+ * @see     TreeMap
+ * @see     AbstractList
+ * @since   1.2
+ */
+public class ConcurrentModificationException extends RuntimeException {
+    private static final long serialVersionUID = -3666751008965953603L;
+
+    /**
+     * Constructs a ConcurrentModificationException with no
+     * detail message.
+     */
+    public ConcurrentModificationException() {
+    }
+
+    /**
+     * Constructs a {@code ConcurrentModificationException} with the
+     * specified detail message.
+     *
+     * @param message the detail message pertaining to this exception.
+     */
+    public ConcurrentModificationException(String message) {
+        super(message);
+    }
+
+    /**
+     * Constructs a new exception with the specified cause and a detail
+     * message of {@code (cause==null ? null : cause.toString())} (which
+     * typically contains the class and detail message of {@code cause}.
+     *
+     * @param  cause the cause (which is saved for later retrieval by the
+     *         {@link Throwable#getCause()} method).  (A {@code null} value is
+     *         permitted, and indicates that the cause is nonexistent or
+     *         unknown.)
+     * @since  1.7
+     */
+    public ConcurrentModificationException(Throwable cause) {
+        super(cause);
+    }
+
+    /**
+     * Constructs a new exception with the specified detail message and
+     * cause.
+     *
+     * <p>Note that the detail message associated with <code>cause</code> is
+     * <i>not</i> automatically incorporated in this exception's detail
+     * message.
+     *
+     * @param  message the detail message (which is saved for later retrieval
+     *         by the {@link Throwable#getMessage()} method).
+     * @param  cause the cause (which is saved for later retrieval by the
+     *         {@link Throwable#getCause()} method).  (A {@code null} value
+     *         is permitted, and indicates that the cause is nonexistent or
+     *         unknown.)
+     * @since 1.7
+     */
+    public ConcurrentModificationException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}