diff -r 836adbf7a2cd -r 3317bb8137f4 jdk/src/java.base/share/classes/java/util/IllegalFormatConversionException.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/java/util/IllegalFormatConversionException.java	Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2003, 2012, 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;
+
+/**
+ * Unchecked exception thrown when the argument corresponding to the format
+ * specifier is of an incompatible type.
+ *
+ * <p> Unless otherwise specified, passing a <tt>null</tt> argument to any
+ * method or constructor in this class will cause a {@link
+ * NullPointerException} to be thrown.
+ *
+ * @since 1.5
+ */
+public class IllegalFormatConversionException extends IllegalFormatException {
+
+    private static final long serialVersionUID = 17000126L;
+
+    private char c;
+    private Class<?> arg;
+
+    /**
+     * Constructs an instance of this class with the mismatched conversion and
+     * the corresponding argument class.
+     *
+     * @param  c
+     *         Inapplicable conversion
+     *
+     * @param  arg
+     *         Class of the mismatched argument
+     */
+    public IllegalFormatConversionException(char c, Class<?> arg) {
+        if (arg == null)
+            throw new NullPointerException();
+        this.c = c;
+        this.arg = arg;
+    }
+
+    /**
+     * Returns the inapplicable conversion.
+     *
+     * @return  The inapplicable conversion
+     */
+    public char getConversion() {
+        return c;
+    }
+
+    /**
+     * Returns the class of the mismatched argument.
+     *
+     * @return   The class of the mismatched argument
+     */
+    public Class<?> getArgumentClass() {
+        return arg;
+    }
+
+    // javadoc inherited from Throwable.java
+    public String getMessage() {
+        return String.format("%c != %s", c, arg.getName());
+    }
+}