hg: jdk/sandbox: 8164993: (ch) ReadableByteChannel should note a possible IllegalArgumentException

[chris.hegarty at oracle.com]

Changeset: 46084917fde7
Author:    bpb
Date:      2019-11-22 09:00 -0800
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/46084917fde7

8164993: (ch) ReadableByteChannel should note a possible IllegalArgumentException
Reviewed-by: alanb, darcy

! src/java.base/share/classes/java/nio/channels/DatagramChannel.java
! src/java.base/share/classes/java/nio/channels/FileChannel.java
! src/java.base/share/classes/java/nio/channels/ReadableByteChannel.java
! src/java.base/share/classes/java/nio/channels/ScatteringByteChannel.java