RFR 9: 8178077: jshell tool: crash on ctrl-up or ctrl-down

[Jan Lahoda]

Hi,

The bug is a crash when the user presses Ctrl-up/down (which should 
navigate to the previous/next snippet). This is broken because this 
(needs to) invoke a private method on ConsoleReader, and it lookups the 
method using "in.getClass().getDeclaredMethod", which fails if "in" is a 
subclass of ConsoleReader not a ConsoleReader itself. The fix is to be 
more precise and use "ConsoleReader.class.getDeclaredMethod".

Bug: https://bugs.openjdk.java.net/browse/JDK-8178077
Webrev: http://cr.openjdk.java.net/~jlahoda/8178077/webrev.00/

Any feedback is welcome,
     Jan