java - Foolproof way of differentiating String and UUID

Question

If I have a string "key:<String || UUID>" is there a way where I can extract the string and differentiate of the part after : is a string or a UUID?

Example: in this key:863864947148451183L and key:1234 May be by using the size of a UUID or the number of bytes?

Answer 1

The only foolproof way is to use

UUID.fromString(yourString);

It will return an

java.lang.IllegalArgumentException: Invalid UUID string: "someString"

Handle the exception.

The javadoc explains the UUID format.