diff -r 05224402145d -r d382dacfd73f rt/emul/mini/src/main/java/java/lang/RuntimeException.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rt/emul/mini/src/main/java/java/lang/RuntimeException.java	Tue Feb 26 16:54:16 2013 +0100
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 1995, 2011, 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.lang;
+
+/**
+ * {@code RuntimeException} is the superclass of those
+ * exceptions that can be thrown during the normal operation of the
+ * Java Virtual Machine.
+ *
+ * <p>{@code RuntimeException} and its subclasses are <em>unchecked
+ * exceptions</em>.  Unchecked exceptions do <em>not</em> need to be
+ * declared in a method or constructor's {@code throws} clause if they
+ * can be thrown by the execution of the method or constructor and
+ * propagate outside the method or constructor boundary.
+ *
+ * @author  Frank Yellin
+ * @jls 11.2 Compile-Time Checking of Exceptions
+ * @since   JDK1.0
+ */
+public class RuntimeException extends Exception {
+    static final long serialVersionUID = -7034897190745766939L;
+
+    /** Constructs a new runtime exception with {@code null} as its
+     * detail message.  The cause is not initialized, and may subsequently be
+     * initialized by a call to {@link #initCause}.
+     */
+    public RuntimeException() {
+        super();
+    }
+
+    /** Constructs a new runtime exception with the specified detail message.
+     * The cause is not initialized, and may subsequently be initialized by a
+     * call to {@link #initCause}.
+     *
+     * @param   message   the detail message. The detail message is saved for
+     *          later retrieval by the {@link #getMessage()} method.
+     */
+    public RuntimeException(String message) {
+        super(message);
+    }
+
+    /**
+     * Constructs a new runtime exception with the specified detail message and
+     * cause.  <p>Note that the detail message associated with
+     * {@code cause} is <i>not</i> automatically incorporated in
+     * this runtime exception's detail message.
+     *
+     * @param  message the detail message (which is saved for later retrieval
+     *         by the {@link #getMessage()} method).
+     * @param  cause the cause (which is saved for later retrieval by the
+     *         {@link #getCause()} method).  (A <tt>null</tt> value is
+     *         permitted, and indicates that the cause is nonexistent or
+     *         unknown.)
+     * @since  1.4
+     */
+    public RuntimeException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    /** Constructs a new runtime exception with the specified cause and a
+     * detail message of <tt>(cause==null ? null : cause.toString())</tt>
+     * (which typically contains the class and detail message of
+     * <tt>cause</tt>).  This constructor is useful for runtime exceptions
+     * that are little more than wrappers for other throwables.
+     *
+     * @param  cause the cause (which is saved for later retrieval by the
+     *         {@link #getCause()} method).  (A <tt>null</tt> value is
+     *         permitted, and indicates that the cause is nonexistent or
+     *         unknown.)
+     * @since  1.4
+     */
+    public RuntimeException(Throwable cause) {
+        super(cause);
+    }
+
+    /**
+     * Constructs a new runtime exception with the specified detail
+     * message, cause, suppression enabled or disabled, and writable
+     * stack trace enabled or disabled.
+     *
+     * @param  message the detail message.
+     * @param cause the cause.  (A {@code null} value is permitted,
+     * and indicates that the cause is nonexistent or unknown.)
+     * @param enableSuppression whether or not suppression is enabled
+     *                          or disabled
+     * @param writableStackTrace whether or not the stack trace should
+     *                           be writable
+     *
+     * @since 1.7
+     */
+    protected RuntimeException(String message, Throwable cause,
+                               boolean enableSuppression,
+                               boolean writableStackTrace) {
+        super(message, cause, enableSuppression, writableStackTrace);
+    }
+}