[11] RFR: 8170769 Provide a simple hexdump facility for binary data (original) (raw)

Vincent Ryan vincent.x.ryan at oracle.com
Wed May 9 22:49:20 UTC 2018

Thanks for your comments Max.

On 9 May 2018, at 03:34, Weijun Wang <weijun.wang at oracle.com> wrote:

Nice tool. However, I am not sure how toFormattedHexString() and toPrintableString() are useful, seems only for providing a customizable dump format which is, actually, not very customizable.

These provide implementations only to generate the human-readable hexdump format. They are not designed to be customizable. Custom formats should be supplied via Hex.Formatter.

For me, toHexString and fromHexString are of course the most useful methods. As for dump, I can only think of 1. The existing sun.security.HexDumpEncoder format, when I want to dump a lot of bytes as a block 2. "00:11:22:33:AA:BB:CC" which fits in one line and also easy to read, when I want inline debugging output If the customizable dump method is both powerful and simple enough to create 2) above, I'll be happy. Otherwise, I can live with toHexString().replaceAll("(..)(?=.)", "$1:”).

How about adding another toHexString method that takes a delimiter character?

Thanks Max

On May 4, 2018, at 4:22 AM, Vincent Ryan <Vincent.X.Ryan at oracle.com> wrote:

Hello, Please review this proposal for a new API to conveniently generate and display binary data using hex string representation. It supports both bulk and stream operations and it can also generate the well-known hexdump format [1]. Thanks

Bug: https://bugs.openjdk.java.net/browse/JDK-8170769 API: http://cr.openjdk.java.net/~vinnie/8170769/javadoc.05/api/java.base/java/util/Hex.html Webrev: http://cr.openjdk.java.net/~vinnie/8170769/webrev.05/

[1] https://docs.oracle.com/cd/E8682401/html/E54763/hexdump-1.html

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