8253459: Formatter treats index, width and precision > Integer.MAX_VALUE incorrectly

Reviewed-by: rriggs, smarks

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

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2020, 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 index is not within the valid
+ * range of supported argument index values. If an index value isn't
+ * representable by an {@code int} type, then the value
+ * {@code Integer.MIN_VALUE} will be used in the exception.
+ *
+ * @since 16
+ */
+class IllegalFormatArgumentIndexException extends IllegalFormatException {
+
+    @java.io.Serial
+    private static final long serialVersionUID = 4191767811181838112L;
+
+    private final int illegalIndex;
+
+    /**
+     * Constructs an instance of this class with the specified argument index
+     * @param index The value of a corresponding illegal argument index.
+     */
+    IllegalFormatArgumentIndexException(int index) {
+        illegalIndex = index;
+    }
+
+    /**
+     * Gets the value of the illegal index.
+     * Returns {@code Integer.MIN_VALUE} if the illegal index is not
+     * representable by an {@code int}.
+     * @return the illegal index value
+     */
+    int getIndex() {
+        return illegalIndex;
+    }
+
+    @Override
+    public String getMessage() {
+        int index = getIndex();
+
+        if (index == Integer.MIN_VALUE) {
+           return "Format argument index: (not representable as int)";
+        }
+
+        return String.format("Illegal format argument index = %d", getIndex());
+    }
+
+}