https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/net/InetAddress.html#isReachable(java.net.NetworkInterface,int,int)
https://hg.openjdk.java.net/jdk/jdk/file/abe21b82ff7c/src/java.base/share/classes/java/net/InetAddress.java#l534

diff -r abe21b82ff7c src/java.base/share/classes/java/net/InetAddress.java
--- a/src/java.base/share/classes/java/net/InetAddress.java Mon Dec 24 12:18:40 2018 +0530
+++ b/src/java.base/share/classes/java/net/InetAddress.java Mon Dec 24 12:04:57 2018 -0800
@@ -531,7 +531,7 @@
      * @param timeout the time, in milliseconds, before the call aborts
      * @throws IllegalArgumentException if either {@code timeout}
      * or {@code ttl} are negative.
- * @return a {@code boolean}indicating if the address is reachable.
+ * @return a {@code boolean} indicating if the address is reachable.
      * @throws IOException if a network error occurs
      * @since 1.5
      */

https://hg.openjdk.java.net/jdk/jdk/file/abe21b82ff7c/src/java.base/share/classes/java/net/Socket.java#l1105
https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/net/Socket.html#getOOBInline()

diff -r abe21b82ff7c src/java.base/share/classes/java/net/Socket.java
--- a/src/java.base/share/classes/java/net/Socket.java Mon Dec 24 12:18:40 2018 +0530
+++ b/src/java.base/share/classes/java/net/Socket.java Mon Dec 24 12:04:57 2018 -0800
@@ -1102,7 +1102,7 @@
      * Tests if {@link SocketOptions#SO_OOBINLINE SO_OOBINLINE} is enabled.
      *
      * @return a {@code boolean} indicating whether or not
- * {@link SocketOptions#SO_OOBINLINE SO_OOBINLINE}is enabled.
+ * {@link SocketOptions#SO_OOBINLINE SO_OOBINLINE} is enabled.
      *
      * @exception SocketException if there is an error
      * in the underlying protocol, such as a TCP error.


https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/net/URLConnection.html#getHeaderField(int)
https://hg.openjdk.java.net/jdk/jdk/file/abe21b82ff7c/src/java.base/share/classes/java/net/URLConnection.java#l684

diff -r abe21b82ff7c src/java.base/share/classes/java/net/URLConnection.java
--- a/src/java.base/share/classes/java/net/URLConnection.java Mon Dec 24 12:18:40 2018 +0530
+++ b/src/java.base/share/classes/java/net/URLConnection.java Mon Dec 24 12:04:57 2018 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1995, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1995, 2018, 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
@@ -681,7 +681,7 @@
     /**
      * Returns the value for the {@code n}^th header field.
      * It returns {@code null} if there are fewer than
- * {@code n+1}fields.
+ * {@code n+1} fields.
      * <p>
      * This method can be used in conjunction with the
      * {@link #getHeaderFieldKey(int) getHeaderFieldKey} method to iterate through all