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GUID regex Java
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GUID

GUID is an acronym for Globally Unique Identifier and used for resource identification. The term is generally used instead of UUID when working with Microsoft technologies.

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GUID regex

Below is a simple regular expression to match a guide in a given string:


Pattern.compile("^(?:\\{{0,1}(?:[0-9a-fA-F]){8}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){12}\\}{0,1})$")

Test it!
/^(?:\{{0,1}(?:[0-9a-fA-F]){8}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){12}\}{0,1})$/

True

False

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Example code in Java:


import java.util.regex.Pattern;
import java.util.regex.MatchResult;
import java.util.Arrays;

public class Main {

    public static void main(String []args) {
        // Validate GUID
        boolean isMatch = Pattern.compile("^(?:\\{{0,1}(?:[0-9a-fA-F]){8}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){12}\\}{0,1})$")
               .matcher("{51d52cf1-83c9-4f02-b117-703ecb728b74}")
               .find(); 
        System.out.println(isMatch); // prints true
        
        // Extract GUID from a string
        String[] matches = Pattern.compile("(?:\\{{0,1}(?:[0-9a-fA-F]){8}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){12}\\}{0,1})")
                          .matcher("Resource {51d52cf1-83c9-4f02-b117-703ecb728b74} is down")
                          .results()
                          .map(MatchResult::group)
                          .toArray(String[]::new);
        System.out.println(Arrays.toString(matches)); // prints [{51d52cf1-83c9-4f02-b117-703ecb728b74}]
    }
}

Test it!

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Test it!

True

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