--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/EmptyDocComments.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,143 @@
+/*
+ * Copyright 1999 Sun Microsystems, Inc.  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.
+ *
+ * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/**
+ * @test
+ * @bug 4160204 4234488
+ * @summary Create empty javadoc comments and verify that javac does not crash.
+ * @compile EmptyDocComments.java
+ */
+
+// WARNING: This file intentionally contains whitespace characters at the end of
+// some lines.  Do not delete them!
+
+// If this file fails to compile, then the test has failed.  The test does not
+// need to be run.
+
+public class EmptyDocComments
+{
+    public static void Main(String [] args)
+    {
+    }
+
+    // Verify that empty doc comments don't cause a crash.
+
+    /**
+     *  */
+    public static void emptyDocComment0()
+    {
+        System.out.println("javadoc comment");
+        System.out.println("- contains whitespace");
+        System.out.println("- ends on same line as potential comment");
+    }
+
+    /**
+     ***/
+    public static void emptyDocComment1()
+    {
+        System.out.println("javadoc comment");
+        System.out.println("- contains nothing");
+        System.out.println("- ends on same line as potential comment");
+    }
+
+    /** */
+    public static void emptyDocComment2()
+    {
+        System.out.println("javadoc comment");
+        System.out.println("- contains whitespace");
+        System.out.println("- ends on same line as comment start");
+    }
+
+    /**
+      *
+      */
+    public static void emptyDocComment3()
+    {
+        System.out.println("javadoc comment");
+        System.out.println("- contains whitespace");
+        System.out.println("- ends on new line ");
+    }
+
+    /***/
+    public static void emptyDocComment4()
+    {
+        System.out.println("minimal javadoc comment");
+        System.out.println("- contains nothing");
+        System.out.println("- ends on same line as comment start");
+    }
+
+    /**/
+    public static void emptyDocComment5()
+    {
+        System.out.println("minimal _java_ comment");
+        System.out.println("- contains nothing");
+        System.out.println("- ends on same line as comment start");
+    }
+
+    /** **** */
+    public static void emptyDocComment6()
+    {
+        System.out.println("javadoc comment");
+        System.out.println("- contains \"*\"");
+        System.out.println("- ends on same line as comment start");
+    }
+
+    // Verify that we properly handle very small, non-empty comments.
+
+    /** a */
+    public static void singleChar0()
+    {
+        System.out.println("javadoc comment");
+        System.out.println("- contains a single character");
+        System.out.println("- ends on same line as comment start");
+    }
+
+    /**
+     * a      */
+    public static void singleChar1()
+    {
+        System.out.println("javadoc comment");
+        System.out.println("- contains a single character and trailing whitespace");
+        System.out.println("- ends on same line as potential comment");
+    }
+
+    /**
+     * a
+     */
+    public static void singleChar2()
+    {
+        System.out.println("javadoc comment");
+        System.out.println("- contains a single character, no trailing whitespace");
+        System.out.println("- ends on new line ");
+    }
+
+    /**
+       a
+     */
+    public static void singleChar3()
+    {
+        System.out.println("javadoc comment");
+        System.out.println("- contains a single character and trailing whitespace");
+        System.out.println("- ends on new line ");
+    }
+}