RFR: 8342936: Enhance java.io.IO with parameter-less println() and readln() [v3]

[Jaikiran Pai]

On Tue, 29 Oct 2024 08:13:22 GMT, Jan Lahoda <jlahoda at openjdk.org> wrote:

>> This PR is simply adding parameter-less `java.io.IO.{println(),readln()}`, with the (hopefully) obvious semantics, plus the corresponding wiring to make those work. This may become part of JEP 495:
>> https://openjdk.org/jeps/495
>
> Jan Lahoda has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fixing test for Console.readln/readLine, ensuring the proper methods are called.

src/java.base/share/classes/java/io/Console.java line 240:

> 238:      *          if an end of stream has been reached without having read
> 239:      *          any characters.
> 240:      *

Should we specify (both here and in the `IO.readln()`) what is returned if only the line-terminator character is read from the console? A brief look at the implementation seems to suggest that we return an empty `String`.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/21693#discussion_r1822111523