Sometimes the web or API developers need to generate random unique ID or UUID for their application. It uses for verification or another security purpose. Right now, we will show you a few examples of UUID generation using the build-in Java UUID. This time will be different than the previous tutorial because we will use online Groovy code runner. There are some Groovy and another language code runner or executor online, you can choose one of this code runner.
Generate Groovy Random UUID
To start to generate Groovy random UUID just copy this code and paste in online Groovy code executor.
def verCode = UUID.randomUUID().toString() println verCode
When you click 'run' or execute button, it will display UUID code in String format.
Find Out Version
To find out version and variant, run this codes.
UUID uuid = UUID.randomUUID() println "Random UUID: "+uuid println "UUID Variant: "+uuid.variant() println "UUID Version: "+uuid.version()
That codes will display like this.
Random UUID: 536e97e9-0d29-43ec-b8d5-a505d3ee6a8f UUID Variant: 2 UUID Version: 4
Create a UUID from the String
To create a UUID from the string standard representation, use these codes.
String uuidString = "536e97e9-0d29-43ec-b8d5-a505d3ee6a8f" UUID uuid = UUID.fromString(uuidString) println "UUID from String: "+uuid
The result will be the same as String UUID.
UUID from String: 536e97e9-0d29-43ec-b8d5-a505d3ee6a8f
That it's the examples of generating UUID using Groovy. You can apply that method in your Grails web application or other Groovy-based frameworks.
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