8264779: Fix doclint warnings in java/nio

Reviewed-by: chegar, iris, alanb, naoto

make/scripts/genExceptions.sh

@@ -1,6 +1,6 @@
 #! /bin/sh
 #
-# Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2000, 2021, 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
@@ -68,6 +68,9 @@ __END__
 
     cat >>$out <<__END__
 
+    /**
+     * The $ARG_PHRASE.
+     */
     private $ARG_TYPE $ARG_ID;
 
     /**

src/java.base/share/classes/java/nio/charset/MalformedInputException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2021, 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
@@ -41,6 +41,9 @@ public class MalformedInputException
     @java.io.Serial
     private static final long serialVersionUID = -3438823399834806194L;
 
+    /**
+     * The length of the input.
+     */
     private int inputLength;
 
     /**

src/java.base/share/classes/java/nio/charset/UnmappableCharacterException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2021, 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
@@ -41,6 +41,9 @@ public class UnmappableCharacterException
     @java.io.Serial
     private static final long serialVersionUID = -7026962371537706123L;
 
+    /**
+     * The length of the input character (or byte) sequence.
+     */
     private int inputLength;
 
     /**

src/java.base/share/classes/java/nio/charset/exceptions

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2000, 2007, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2000, 2021, 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
@@ -28,7 +28,7 @@
 SINCE=1.4
 PACKAGE=java.nio.charset
 # This year should only change if the generated source is modified.
-COPYRIGHT_YEARS="2000, 2007,"
+COPYRIGHT_YEARS="2000, 2021,"
 
 SUPER=java.io.IOException
 

src/java.base/share/classes/java/nio/exceptions

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2000, 2007, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2000, 2021, 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
@@ -28,7 +28,7 @@
 SINCE=1.4
 PACKAGE=java.nio
 # This year should only change if the generated source is modified.
-COPYRIGHT_YEARS="2000, 2007,"
+COPYRIGHT_YEARS="2000, 2021,"
 
 
 SUPER=RuntimeException

src/java.base/share/classes/java/nio/file/DirectoryIteratorException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 2021, 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
@@ -73,9 +73,19 @@ public final class DirectoryIteratorException
     /**
      * Called to read the object from a stream.
      *
+     * @param   s
+     *          the {@code ObjectInputStream} to read
+     *
      * @throws  InvalidObjectException
      *          if the object is invalid or has a cause that is not
      *          an {@code IOException}
+     *
+     * @throws  IOException
+     *          if an I/O error occurs
+     *
+     * @throws  ClassNotFoundException
+     *          if the class of a serialized object could not be
+     *          found
      */
     @java.io.Serial
     private void readObject(ObjectInputStream s)

src/java.base/share/classes/java/nio/file/FileSystemException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2021, 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
@@ -40,7 +40,15 @@ public class FileSystemException
     @java.io.Serial
     static final long serialVersionUID = -3055425747967319812L;
 
+    /**
+     *  String identifying the file or {@code null} if not known.
+     */
     private final String file;
+
+    /**
+     *  String identifying the other file or {@code null} if there isn't
+     *  another file or if not known.
+     */
     private final String other;
 
     /**

src/java.base/share/classes/java/nio/file/InvalidPathException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2021, 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
@@ -39,7 +39,15 @@ public class InvalidPathException
     @java.io.Serial
     static final long serialVersionUID = 4355821422286746137L;
 
+    /**
+     * The input string.
+     */
     private String input;
+
+    /**
+     * The index of the input string at which the error occurred or
+     * {@code -1} if not known.
+     */
     private int index;
 
     /**

src/java.base/share/classes/java/nio/file/attribute/UserPrincipalNotFoundException.java

@@ -40,6 +40,9 @@ public class UserPrincipalNotFoundException
     @java.io.Serial
     static final long serialVersionUID = -5369283889045833024L;
 
+    /**
+     * The user principal name.
+     */
     private final String name;
 
     /**