diff -r 33de7752835c -r 94bb65cb37d3 src/java.base/share/classes/java/io/PushbackReader.java
--- a/src/java.base/share/classes/java/io/PushbackReader.java	Fri Sep 20 11:33:30 2019 +0800
+++ b/src/java.base/share/classes/java/io/PushbackReader.java	Fri Sep 20 11:07:52 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1996, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2019, 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
@@ -47,7 +47,7 @@
      *
      * @param   in   The reader from which characters will be read
      * @param   size The size of the pushback buffer
-     * @exception IllegalArgumentException if {@code size <= 0}
+     * @throws  IllegalArgumentException if {@code size <= 0}
      */
     public PushbackReader(Reader in, int size) {
         super(in);
@@ -79,7 +79,7 @@
      * @return     The character read, or -1 if the end of the stream has been
      *             reached
      *
-     * @exception  IOException  If an I/O error occurs
+     * @throws     IOException  If an I/O error occurs
      */
     public int read() throws IOException {
         synchronized (lock) {
@@ -101,8 +101,8 @@
      * @return     The number of characters read, or -1 if the end of the
      *             stream has been reached
      *
-     * @exception  IOException  If an I/O error occurs
-     * @exception  IndexOutOfBoundsException {@inheritDoc}
+     * @throws     IOException  If an I/O error occurs
+     * @throws     IndexOutOfBoundsException {@inheritDoc}
      */
     public int read(char cbuf[], int off, int len) throws IOException {
         synchronized (lock) {
@@ -146,8 +146,8 @@
      *
      * @param  c  The int value representing a character to be pushed back
      *
-     * @exception  IOException  If the pushback buffer is full,
-     *                          or if some other I/O error occurs
+     * @throws IOException  If the pushback buffer is full,
+     *                      or if some other I/O error occurs
      */
     public void unread(int c) throws IOException {
         synchronized (lock) {
@@ -165,11 +165,11 @@
      * character after that will have the value <code>cbuf[off+1]</code>, and
      * so forth.
      *
-     * @param  cbuf  Character array
-     * @param  off   Offset of first character to push back
-     * @param  len   Number of characters to push back
+     * @param      cbuf  Character array
+     * @param      off   Offset of first character to push back
+     * @param      len   Number of characters to push back
      *
-     * @exception  IOException  If there is insufficient room in the pushback
+     * @throws     IOException  If there is insufficient room in the pushback
      *                          buffer, or if some other I/O error occurs
      */
     public void unread(char cbuf[], int off, int len) throws IOException {
@@ -188,9 +188,9 @@
      * read will have the value <code>cbuf[0]</code>, the character after that
      * will have the value <code>cbuf[1]</code>, and so forth.
      *
-     * @param  cbuf  Character array to push back
+     * @param      cbuf  Character array to push back
      *
-     * @exception  IOException  If there is insufficient room in the pushback
+     * @throws     IOException  If there is insufficient room in the pushback
      *                          buffer, or if some other I/O error occurs
      */
     public void unread(char cbuf[]) throws IOException {
@@ -200,7 +200,7 @@
     /**
      * Tells whether this stream is ready to be read.
      *
-     * @exception  IOException  If an I/O error occurs
+     * @throws     IOException  If an I/O error occurs
      */
     public boolean ready() throws IOException {
         synchronized (lock) {
@@ -213,7 +213,7 @@
      * Marks the present position in the stream. The <code>mark</code>
      * for class <code>PushbackReader</code> always throws an exception.
      *
-     * @exception  IOException  Always, since mark is not supported
+     * @throws     IOException  Always, since mark is not supported
      */
     public void mark(int readAheadLimit) throws IOException {
         throw new IOException("mark/reset not supported");
@@ -223,7 +223,7 @@
      * Resets the stream. The <code>reset</code> method of
      * <code>PushbackReader</code> always throws an exception.
      *
-     * @exception  IOException  Always, since reset is not supported
+     * @throws     IOException  Always, since reset is not supported
      */
     public void reset() throws IOException {
         throw new IOException("mark/reset not supported");
@@ -244,7 +244,7 @@
      * Closing a previously closed stream has no effect. This method will block
      * while there is another thread blocking on the reader.
      *
-     * @exception  IOException  If an I/O error occurs
+     * @throws     IOException  If an I/O error occurs
      */
     public void close() throws IOException {
         synchronized (lock) {
@@ -257,12 +257,12 @@
      * Skips characters.  This method will block until some characters are
      * available, an I/O error occurs, or the end of the stream is reached.
      *
-     * @param  n  The number of characters to skip
+     * @param     n  The number of characters to skip
      *
      * @return    The number of characters actually skipped
      *
-     * @exception  IllegalArgumentException  If <code>n</code> is negative.
-     * @exception  IOException  If an I/O error occurs
+     * @throws    IllegalArgumentException  If <code>n</code> is negative.
+     * @throws    IOException  If an I/O error occurs
      */
     public long skip(long n) throws IOException {
         if (n < 0L)