java - Validate UUID without divider "-" -

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i uuids in format "005056963ab75fd48bdc59c100314c40" , want validate them. tried code this:

public boolean isuuid(string uuid){      try {         uuid.fromstring(uuid);     } catch (exception e) {         return false;     }     return true;  }

but tell me "005056963ab75fd48bdc59c100314c40" not valid id. site http://guid.us/test/guid on other hand tells me , gives me uuid "-" added. there elegant way validate uuid in java or have manually add "-" right places?

try regex

    uuid = uuid.replaceall("(.{8})(.{4})(.{4})(.{4})(.+)", "$1-$2-$3-$4-$5");     uuid.fromstring(uuid);

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