javastringuuid

Foolproof way of differentiating String and UUID

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?

Solution

  • 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.