CODEWITHSUNDEEP
utf-8asciiencodeuuid
heisenberg_
heisenberg_

Reputation: 51

UUID encoded as ascii not as utf-8

In almost all examples UUID is encoded to utf-8 for example.

"aa4aaa2c-c6ca-d5f5-b8b2-0b5c78ee2cb7".getBytes(StandardCharsets.UTF_8))

UUID is not ascii format? Why everyone encodes to utf-8?

Upvotes: 0

Views: 3584

Answers (2)

Antoine Mottier
Antoine Mottier

Reputation: 1183

UUID is encoded as a 128-bit object (see RFC4122). Your example is the textual representation in hexadecimal of an UUID value.

There is no particular encoding required for UUID. I guess UTF-8 is used probably because it is the default encoding for various exchange formats such as for example JSON.

Upvotes: 2

Rob Napier
Rob Napier

Reputation: 299605

What do you mean by "UUID is not ascii format?" UUID is a 128-bit number, and this is one (ambiguous) way to encode it into a string. Do you mean "why do people use UTF-8 when ASCII is equivalent?" Because it's good habit to use UTF-8 for most things unless you have a reason not to. When it's equivalent to ASCII, it's the same, so it doesn't matter. When it's not equivalent to ASCII, you usually wanted UTF-8.

Upvotes: 0

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